EXHIBIT 10.15


                              SUBLEASE AGREEMENT

                            DATED OCTOBER 31, 1996

                            BETWEEN REGISTRANT AND

                              SILICON VALLEY BANK

 
                             OFFICE BUILDING LEASE

                               TABLE OF CONTENTS




                                                                PAGE
                                                                ----

                                                         
1.   BASIC LEASE TERMS........................................   1

2.   PREMISES AND COMMON AREAS................................   1

     (a)      Premises........................................   1
     (b)      Mutual Covenants................................   1
     (c)      Tenant's Use of Common Areas....................   1
     (d)      Landlord's Reservation of Rights................   2

3.   TERM; COMMENCEMENT DATE..................................   2

4.   POSSESSION...............................................   2

     (a)      Delivery of Possession..........................   2
     (b)      Condition of Premises...........................   2

5.   RENT.....................................................   3

     (a)      Monthly Base Rent...............................   3
     (b)      Additional Rent.................................   3
     (c)      Late Payments...................................   3

6.   OPERATING EXPENSES.......................................   3

     (a)      Operating Expenses..............................   3
     (b)      Base Year Operating Expenses....................   3
     (c)      Estimate Statement..............................   3
     (d)      Actual Statement................................   4
     (e)      Miscellaneous...................................   4
     (f)      After-Hours HVAC................................   5
     (g)      Tenant's Audit Rights...........................   5

7.   SECURITY DEPOSIT.........................................   5

8.   USE......................................................   5

     (a)      Tenant's Use of the Premises....................   5
     (b)      Compliance......................................   6

9.   NOTICES..................................................   7

10.  BROKERS..................................................   7

11.  SURRENDER; HOLDING OVER..................................   8

     (a)      Surrender.......................................   8
     (b)      Holding Over....................................   8

12.  TAXES ON TENANT'S PROPERTY...............................   8

13.  ALTERATIONS..............................................   8

                                      -i-


 
                               TABLE OF CONTENTS
                                  (continued)


                                                               Page
                                                               ----
                                                           
14.  REPAIRS..................................................   10

     (a)      Landlord's Obligations..........................   10
     (b)      Tenant's Obligations............................   10
     (c)      Tenant's Failure to Repair......................   11

15.  LIENS....................................................   11

16.  ENTRY BY LANDLORD........................................   11

18.  ASSUMPTION OF RISK AND INDEMNIFICATION...................   12

     (a)      Tenant's Assumption of Risk and Waiver..........   12
     (b)      Indemnification.................................   12
     (c)      Survival; No Release of Insurers................   13

19.  INSURANCE................................................   13

     (a)      Tenant's Insurance..............................   13
     (b)      Supplemental Tenant Insurance Requirements......   14
     (c)      Tenant's Use....................................   14
     (d)      Cancellation of Landlord's Policies.............   15
     (e)      Mutual Waiver of Subrogation....................   15

20.  DAMAGE OR DESTRUCTION....................................   15

     (a)      Partial Destruction.............................   15
     (b)      Substantial Destruction.........................   15
     (c)      Notice..........................................   15
     (d)      Tenant's Termination Rights.....................   16
     (e)      Tenant's Costs and Insurance Proceeds...........   16
     (f)      Abatement of Rent...............................   16
     (g)      Inability to Complete...........................   16
     (h)      Damage Near End of Term.........................   16
     (i)      Waiver of Termination Right.....................   16
     (j)      Termination.....................................   17

21.  EMINENT DOMAIN...........................................   17

     (a)      Substantial Taking..............................   17
     (b)      Partial Taking; Abatement of Rent...............   17
     (c)      Condemnation Award..............................   17
     (d)      Temporary Taking................................   17

22.  DEFAULTS AND REMEDIES....................................   17


     (a) Default By Tenant....................................   17
     (b) Notices..............................................   18
     (c) Landlord's Remedies; Termination.....................   18
     (d) Landlord's Remedies: Re-Entry Rights.................   19
     (e) Landlord's Remedies: Re-Letting......................   19
     (f) Landlord's Remedies; Performance for Tenant..........   19
     (g) Late Payment.........................................   19
     (h) Intentionally omitted................................   20

                                     -ii-

 

 
                               TABLE OF CONTENTS
                                  (continued)



                                                               Page
                                                               ----
                                                        

     (i) Rights and Remedies Cumulative.......................   20

23.  LANDLORD'S DEFAULT.......................................   20

24.  ASSIGNMENT AND SUBLETTING................................   20

     (a)      Restriction on Transfer.........................   20
     (b)      Corporate and Partnership Transfers.............   20
     (c)      Permitted Controlled Transfers..................   20
     (d)      Transfer Notice.................................   21
     (e)      Landlord's Options..............................   21
     (f)      Reasonable Disapproval..........................   21
     (g)      Additional Conditions...........................   21
     (h)      Excess Rent.....................................   22
     (i)      Intentionally omitted...........................   22
     (j)      No Release......................................   22
     (k)      Administrative and Attorneys' Fees..............   22

25.  SUBORDINATION............................................   23

26.  ESTOPPEL CERTIFICATE.....................................   23

     (a)      Tenant's Obligations............................   23
     (b)      Tenant's Failure to Deliver.....................   24

27.  Intentionally omitted....................................   24

28.  RULES AND REGULATIONS....................................   24

29.  MODIFICATION AND CURE RIGHTS OF LANDLORD'S MORTGAGEES
     AND LESSORS..............................................   24

     (a)      Modifications...................................   24
     (b)      Cure Rights.....................................   24

30.  DEFINITION OF LANDLORD...................................   24

31.  WAIVER...................................................   25

32.  PARKING..................................................   25

     (a)      Grant of Parking Rights.........................   25
     (b)      Visitor Parking.................................   25
     (c)      Use of Parking Spaces...........................   25
     (d)      General Provisions..............................   26
     (e)      Cooperation with Traffic Mitigation Measures....   26
     (f)      Parking Rules and Regulations...................   26

33.  FORCE MAJEURE............................................   26

34.  SIGNS....................................................   27

35.  LIMITATION ON LIABILITY..................................   27

                                     -iii-


 
                               TABEL OF CONTENTS
                                  (continued)




                                                               Page
                                                               ----
                                                         
36.  FINANCIAL STATEMENTS.....................................   28

37.  QUIET ENJOYMENT..........................................   28

38.  MISCELLANEOUS............................................   28

     (a)      Conflict of Laws................................   28
     (b)      Successors and Assigns..........................   28
     (c)      Professional Fees and Costs.....................   28
     (d)      Terms and Headings..............................   28
     (e)      Time............................................   28
     (f)      Prior Agreement; Amendments.....................   28
     (g)      Separability....................................   28
     (h)      Recording.......................................   28
     (i)      Counterparts....................................   28
     (j)      Nondisclosure of Lease Terms....................   28
     (k)      Use of Project or Building Name.................   29
     (l)      No Light and Air Easement.......................   29

39.  RESOLUTION OF DISPUTES...................................   29

     (a)      Reference of Dispute............................   29
     (b)      Cooperation.....................................   30
     (c)      Allocation of Costs.............................   30

40.  EXECUTION OF LEASE.......................................   30

     (a)      Joint and Several Obligations...................   30
     (b)      Tenant as Corporation or Partnership............   30
     (c)      Examination of Lease............................   30


EXHIIBITS:

A    Site Plan
B    Floor Plan
C    Work Letter Agreement
D    Notice of Lease Term Dates and Tenant's Percentage
E    Definition of Operation Expenses
F    Standards of Utilities and Services
G    Estoppel Certificate
H    Rules and Regulations
I    Tenant's Insurance Requirements

                                     -iv-

 
                                                                   EXHIBIT 10.15

                                   SUBLEASE


     This sublease (the "Sublease") is made on October 31, 1996, between
Silicon Valley Bank ("Sublandlord"), whose address is 3003 Tasman Drive, Santa
Clara, CA 95054 and AUTO-BY-TEL CORP. ("Subtenant"), whose address is 18872
MacArthur Boulevard, Suite 200, Irvine, CA 92612, who agree as follows:

     1.   Recitals.  This Sublease is made with reference to the following facts
          --------                                                             
and objectives:

          (a)  The Provider Fund, as successor in interest to McDonnell Douglas
Realty Company, as Landlord ("Master Landlord"), and Sublandlord, as Tenant,
have entered into a written lease dated December 4, 1995, as amended by a first
amendment entered into as of March 29, 1996 and a second amendment entered into
as of June 1, 1996 (as amended, the "Master Lease"), regarding that certain real
property located on 18872 MacArthur Boulevard (the "Building"), Suites 100 and
150, Irvine, CA 92612, as more particularly described therein (the "Premises").
A copy of the Master Lease is attached hereto as Exhibit "A".

          (b)  Subtenant desires to sublet the portion of the Premises commonly
referred to as Suite 150 ("Suite 150"), from Sublandlord on the provisions
contained in this Sublease.  A floor plan of Suite 150 is attached as Exhibit
"B".

     2.   Premises.  Sublandlord hereby leases to Subtenant and Subtenant hereby
          --------                                                              
leases from Sublandlord Suite 150.  Suite 150, located on the first floor of the
Building, containing 1,361 rentable square feet and 1,237 usable square feet.
Subtenant's Percentage of the 45,454 square foot Building on a rentable square
foot basis, is 2.99%.

     3.   Permitted Use.  Subtenant may use Suite 150 for general office
          -------------                                                 
purposes, and no other use.

     4.   Term; Possession.  The term shall commence on November 1, 1996, and
          ----------------                                                   
shall expire April 30, 1997.  If Sublandlord is unable to deliver possession of
Suite 150 by the date specified for the commencement of the term as a result of
causes beyond its reasonable control, Sublandlord shall not be liable for any
damage caused for failing to deliver possession, provided, however, that
Subtenant shall then have the right to terminate this Sublease.  Subtenant shall
not be liable for any charges hereunder until Sublandlord delivers possession of
Suite 150 to Subtenant, but the term shall not be extended by any delay.
Subtenant shall have no right to extend the term beyond April 30, 1997;
provided, however, that, if Subtenant not less than forty-five (45) days prior
to the expiration date of the term, requests Sublandlord to extend the term for
an additional thirty (30) day period, Sublandlord shall use its best efforts to
respond to Subtenant's request within fifteen (15) days of receipt of the
request.  Any failure by Sublandlord to respond to the request within the
fifteen (15) day period shall not be deemed an acceptance.  Any such thirty (30)
day extensions shall be at Sublandlord's sole discretion and shall otherwise be
in accordance with the terms and conditions set forth herein.

     5.   Rent.  Subtenant agrees to pay Sublandlord One Thousand Nine Hundred
          ----                                                                
Five and 40/100 Dollars ($1,905.40) rent (the "Monthly Base Rent") for Suite 150
in advance on the first day of each calendar month during the Term.  All rent
must be paid to Sublandlord, without any deduction or offset, in lawful money of
the United States of America, at 3003 Tasman Drive, NC 822, Santa Clara, CA
95054, Attn: Shawn Street, or to such other person or at such other place as
Sublandlord may from time to time designate in writing.

     6.   Security Deposit.  On execution of this Sublease, Subtenant shall
          ----------------                                                 
deposit with Sublandlord Two Thousand Ninety-Five and 45/100 Dollars ($2,095.45)
as a security deposit for the performance by Subtenant of the provisions of this
Sublease.  If Subtenant is in default, Sublandlord can use the security deposit,
or any portion of it, to cure the default or to compensate Sublandlord for all
damage sustained by Sublandlord resulting from Subtenant's default.  Subtenant
shall immediately on demand pay to Sublandlord a sum equal to the portion of the
security deposit expended or applied by Sublandlord as provided in this
paragraph so as to maintain the security deposit in the sum initially 

 
deposited with Sublandlord. If Subtenant is not in default at the expiration or
termination of this Sublease, Sublandlord shall return the security deposit to
Subtenant.  Sublandlord's obligations with respect to the security deposit are
those of a debtor and not a trustee. Sublandlord can maintain the security
deposit separate and apart from Sublandlord's general funds or can commingle the
security deposit with Sublandlord's general and other funds. Sublandlord shall
not be required to pay Subtenant interest on the security deposit.

     7.   Incorporation by Reference; Assumption.  The Master Lease is
          --------------------------------------                      
incorporated by reference into, and made a part of, this Sublease to the extent
applicable to Suite 150, except for the following paragraphs:

     Paragraphs 3, 4(a) and (b), 5(a), 6(g), 7, 10, 24(b)-(k), 32, Exhibits A-D,
     Exhibit 1, Addendum to Lease

     Subtenant shall assume and perform to Sublandlord the Tenant's obligations
to the Landlord under the foregoing Master Lease provisions to the extent that
the provisions are applicable to Suite 150 under this Sublease.  To the extent
any of the provisions set forth in the Master Lease conflict with any of the
provisions set forth in this Sublease, the provisions of this Sublease shall
control.

     Sublandlord does not assume the obligations of the Master Landlord under
the provisions of the Master Lease, but shall exercise due diligence in
attempting to cause the Master Landlord to perform its obligations under the
Master Lease for the benefit of Subtenant.  If such obligations are not
performed and materially affect Subtenant's tenancy, Subtenant may terminate
this Sublease by written notice to Sublandlord.

     8.   Operating Expenses.  Subtenant agrees to the following modifications
          ------------------                                                  
to Paragraph 6 of the Master Lease:

          In addition to Monthly Base Rent, throughout the Term of this
     Sublease, Subtenant agrees to pay Sublandlord as additional rent in
     accordance with the terms of this Sublease, Subtenant's Percentage of
     Operating Expenses (as defined in Exhibit "E" to the Master Lease) to the
     extent Subtenant's Percentage of Operating Expenses exceeds Subtenant's
     Percentage of the Base Year Operating Expenses for 1996.

     9.   Insurance.  Subtenant agrees to the following modifications to
          ---------                                                     
Paragraph 19 of the Master Lease:

          The minimum limits of Commercial Public Liability Insurance or
     Comprehensive General Liability Insurance coverage referred to in Paragraph
     19(a)(iii) and of Comprehensive Automobile Liability referred to in
     Paragraph 19(a)(iv) shall not be less than $1,000,000.  In addition to
     Sublandlord, Master Landlord shall also be named as an additional insured.
     Subtenant's insurance shall be primary insurance.  Any other insurance
     maintained by Sublandlord or Master Landlord shall be excess only and not
     contributing with Subtenant's insurance.

     10.  Covenant of Quiet Enjoyment.  Sublandlord represents that the Master
          ---------------------------                                         
Lease is in full force and effect and that there are no defaults on
Sublandlord's part under it as of the commencement of the term of this Sublease.

     Subject to this Sublease terminating as provided in Paragraphs 20 and 21 of
the Master Lease, and Paragraph 11 of this Sublease, Sublandlord represents
that, if Subtenant performs all the provisions in this Sublease to be performed
by Subtenant, Subtenant shall have and enjoy throughout the term of this
Sublease the quiet and undisturbed possession of the premises.

     11.  Master Lease.  This Sublease is subject to all the provisions of the
          ------------                                                        
Master Lease, and Subtenant shall not permit any act or omission to act that
will violate any of the provisions of the Master Lease.

                                      -2-

 
     If the Master Lease terminates, this Sublease shall terminate and the
parties shall be relieved from all liabilities and obligations under this
Sublease; except that if this Sublease terminates as a result of a default of
one of the parties under this Sublease or the Master Lease, or both, the
defaulting party shall be liable to the nondefaulting party for all damage
suffered by the nondefaulting party as a result of termination.

     12.  Attorneys Fees; Jury Trial Waiver; Integration.
          ---------------------------------------------- 

          (a)  In the event any dispute arises in connection with this Sublease,
the prevailing party shall be entitled to recover all of its costs and expenses,
including reasonable attorneys fees.

          (b)  This Sublease shall be governed by, and construed in accordance
with, the internal laws of the State of California, without regard to principles
of conflicts of law.  Each of Sublandlord and Subtenant hereby submits to the
exclusive jurisdiction of the state and Federal courts located in the County of
Los Angeles, State of California.  SUBLANDLORD AND SUBTENANT EACH HEREBY WAIVE
THEIR RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED
UPON OR ARISING OUT OF THIS SUBLEASE, INCLUDING CONTRACT CLAIMS, TORT CLAIMS,
BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW OR STATUTORY CLAIMS.  EACH PARTY
RECOGNIZES AND AGREES THAT THE FOREGOING WAIVER CONSTITUTES A MATERIAL
INDUCEMENT FOR IT TO ENTER INTO THIS SUBLEASE.  EACH PARTY REPRESENTS AND
WARRANTS THAT IT HAS REVIEWED THIS WAIVER WITH ITS LEGAL COUNSEL AND THAT IT
KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION
WITH LEGAL COUNSEL.

          (c)  This Sublease cannot be amended or terminated except by a writing
signed by Sublandlord and Subtenant.  All prior agreements, understandings,
representations, warranties, and negotiations between the parties hereto with
respect to the subject matter of this Sublease, if any, are merged into this
Sublease.

     13.  Landlord's Approval.  The effectiveness of this Sublease shall be
          -------------------                                              
expressly conditioned upon the prior written consent of this Sublease by Master
Landlord in strict accordance with the terms and conditions of Paragraph 24 of
the Master Lease.  Subtenant shall promptly reimburse Sublandlord for any costs
and expenses incurred by Sublandlord in connection with obtaining the Master
Landlord's consent.

Sublandlord                                 Subtenant

SILICON VALLEY BANK                         AUTO-BY-TEL CORP.

By: ______________________________          By: _______________________________

Its: _____________________________          Its: ______________________________

Above is acknowledged and agreed:

THE PROVIDER FUND


By: ______________________________

Its: _____________________________

                                      -3-

 
                                  EXHIBIT "A"



                             OFFICE BUILDING LEASE

                                    BETWEEN

                       McDONNELL DOUGLAS REALTY COMPANY

                                   LANDLORD

                                      AND

                              SILICON VALLEY BANK
                                    TENANT

 
                             OFFICE BUILDING LEASE
                             ---------------------


     THIS OFFICE BUILDING LEASE ("Lease") is entered into as of the _____ day of
_______________, 1995 by and between McDonnell Douglas Realty Company, a
California corporation ("Landlord"), and Silicon Valley Bank ("Tenant").

     1.   BASIC LEASE TERMS.  For purposes of this Lease, the following terms
          -----------------                                                  
have the following definitions and meanings:

     2.   PREMISES AND COMMON AREAS.
          ------------------------- 

          (a)  Premises.  Landlord hereby leases to Tenant and Tenant hereby
               --------                                                     
leases from Landlord, without representation or warranty, express or implied,
the Premises described in Subsection 1(g).  The rentable square feet and usable
square feet of the Premises and the Building set forth above in Section 1 shall
be deemed to be the rentable square feet and usable square feet of the Premises
and Building for all purposes, whether the actual rentable square feet or usable
square feet may be more or less than the amounts set forth above.  In that
regard, Landlord and Tenant have each been given an opportunity to measure or
re-measure the square footage of the Premises prior to execution of this Lease
and Landlord and Tenant each hereby waive any rights they may have following
execution of this Lease to measure or remeasure the Premises or Building or
claim that the rentable square feet or usable square feet of the Premises or
Building is other than as set forth in Section 1.

          (b)  Mutual Covenants.  Landlord and Tenant agree that the letting and
               ----------------                                                 
hiring of the Premises is upon and subject to the terms, covenants and
conditions contained in this Lease and each party covenants as a material part
of the consideration for this Lease to keep and perform their respective
obligations under this Lease.

          (c)  Tenant's Use of Common Areas.  During the Term of this Lease,
               ----------------------------                                 
Tenant shall have the nonexclusive right to use in common with Landlord and all
persons, firms and corporations conducting business in the Project and their
respective customers, guests, licensees, invitees, subtenants, employees and
agents (collectively, "Project Occupants"), subject to the terms of this Lease,
the Rules and Regulations referenced in Section 32 and all covenants, conditions
and restrictions now or hereafter affecting the Project, the following common
areas of the Building and/or the Project (collectively, the "Common Areas"), all
of which shall be subject to Landlord's sole management and control and shall be
operated and maintained in such manner as Landlord in its sole but good faith
discretion shall determine:

               (i)    The Building's common entrances, hallways, lobbies, public
     restrooms on multi-tenant floors, elevators, stairways and accessways,
     loading docks, ramps, drives and platforms and any passageways and
     serviceways thereto, and the common pipes, conduits, wires and appurtenant
     equipment within the Building which serve the Premises (collectively,
     "Building Common Areas"); and

               (ii)   The parking facilities of the Project which serve the
     Building (subject to the provisions of Exhibit "H"), loading and unloading
                                            -----------                        
     areas, trash areas, roadways, sidewalks, walkways, parkways, driveways,
     landscaped areas, plaza areas, fountains and similar areas and facilities
     situated within the Project and appurtenant to the Building which are not
     reserved for the exclusive use of any Project Occupants (collectively,
     "Project Common Areas"),

provided, however, that Landlord shall use reasonable efforts to minimize
interference with Tenant's use of and access to the Premises; and provided,
further, that if Tenant is prevented from using, and does not use, the Premises
or any material portion thereof, for three (3) consecutive business days because
of Landlord's unreasonable interference with Tenant's use of and access to the
Premises and Tenant shall have given Landlord written notice respecting such
interference, then Tenant's Monthly Base Rent shall be abated or reduced, as the
case may be, after expiration of the applicable period of time described above
for such time that Tenant continues to be so prevented from using, and does not
use, the rentable area of the portion of the Premises that Tenant is prevented
from using, and does not 

 
use, based on the ratio that the unusable portion bears to the total rentable
area of the Premises; provided, however, if Tenant reoccupies and conducts its
business from any portion of the Premises during such period, the rent allocable
to such reoccupied portion, based on the proportion that the rentable area of
such reoccupied portion of the Premises bears to the total rentable area of the
Premises, shall be payable by Tenant from the date such business operations
commence; and provided further that the rent abatement described above shall in
no event continue after the time such unreasonable interference ceases.

          (d)  Landlord's Reservation of Rights.  Provided Tenant's use of and
               --------------------------------                               
access to the Premises and parking to be provided to Tenant under this Lease is
not interfered with in an unreasonable manner, Landlord reserves for itself and
for all other owner(s) and operator(s) of the Project Common Areas and the
balance of the Project, the right from time to time to:  (i) install, use,
maintain, repair, replace and relocate pipes, ducts, conduits, wires and
appurtenant meters and equipment above the ceiling surfaces, below the floor
surfaces, within the walls and in the central core areas of the Building; (ii)
make changes to the design and layout of the Project, including, without
limitation, changes to buildings, driveways, entrances, loading and unloading
areas, direction of traffic, landscaped areas and walkways, and, subject to the
parking provisions contained in Section 32 and Exhibit "H", parking spaces and
                                               -----------                    
parking areas; and (iii) use or close temporarily the Building Common Areas, the
Project Common Areas and/or other portions of the Project while engaged in
making improvements, repairs or alterations to the Building, the Project, or any
portion thereof; provided, however, that Landlord shall use its best efforts to
provide Tenant with reasonable advance notice of any closure of such areas.

     3.   TERM; COMMENCEMENT DATE.  The term of this Lease ("Term") will be for
          -----------------------                                              
the period designated in Subsection 1(i), commencing on the Commencement Date,
and ending as of midnight on the last day of the month in which the expiration
of such period occurs (the "Expiration Date"), unless terminated earlier as
provided herein.  Each consecutive twelve (12) month period of the Term of this
Lease, commencing on the Commencement Date, will be referred to herein as a
"Lease Year".  Landlord's Notice of Lease Term Dates and Tenant's Percentage
("Notice"), in the form of Exhibit "D" attached hereto, will set forth the
                           -----------                                    
Commencement Date, the date upon which the Term of this Lease shall end, the
rentable square feet within the Premises and the Building, and Tenant's
Percentage and will be delivered to Tenant after Landlord delivers possession of
the Premises to Tenant.  The Notice will be binding upon Tenant unless Tenant
objects to the Notice in writing within five (5) business days of Tenant's
receipt of the Notice.

     4.   POSSESSION.
          ---------- 

          (a)  Delivery of Possession.  Landlord agrees to deliver possession of
               ----------------------                                           
the Premises to Tenant in accordance with the terms of the Work Letter Agreement
attached hereto as Exhibit "C".  Notwithstanding the foregoing, Landlord will
                   -----------                                               
not be obligated to deliver possession of the Premises to Tenant until Landlord
has received from Tenant all of the following: (i) a copy of this Lease fully
executed by Tenant and the guaranty of Tenant's obligations under this Lease, if
any, executed by the Guarantor(s); (ii) the Security Deposit and the first
installment of Monthly Base Rent; (iii) executed copies of policies of insurance
or certificates thereof as required under Section 19 of this Lease; (iv) copies
of all governmental permits and authorizations, if any, required in connection
with Tenant's operation of its business within the Premises; and (v) if Tenant
is a corporation or partnership, such evidence of due formation, valid existence
and authority as Landlord may reasonably require, which may include, without
limitation, a certificate of good standing, certificate of secretary, articles
of incorporation, statement of partnership, or other similar documentation.

          (b)  Condition of Premises.  By taking possession of the Premises,
               ---------------------                                        
Tenant will be deemed to have accepted the Premises in its condition, subject to
any written punch list items to be performed by Landlord pursuant to the Work
Letter Agreement, on the date of delivery of possession and to have acknowledged
that the Tenant Improvements have been installed as required by the Work Letter
Agreement and that there are no additional items needing work or repair.  Tenant
acknowledges that neither Landlord nor any agent of Landlord has made any
representation or warranty with respect to the Premises, the Building, the
Project or any portions thereof or with respect to the suitability of same for
the conduct of Tenant's business and Tenant further acknowledges that 

                                      -2-

 
Landlord has no obligation to construct or complete any additional buildings or
improvements within the Project.

          (c)  Use and Occupancy Prior to Commencement Date.  If Tenant shall 
               --------------------------------------------   
for any reason use or occupy the Premises in any way prior to the Commencement
Date, then during such prior use or occupancy Tenant shall be a tenant of
Landlord and shall be subject to the covenants and agreements set forth in this
Lease other than provisions pertaining to the payment of Monthly Base Rent.
Nothing herein shall be construed as Landlord's consent to Tenant's use or
occupancy of the Premises for any reason prior to the Commencement Date.

     5.   RENT.
          ---- 

          (a)  Monthly Base Rent.  Tenant agrees to pay Landlord the Monthly 
               -----------------   
Base Rent for the Premises (subject to adjustment as hereinafter provided) in
advance on the first day of each calendar month during the Term, except that
Tenant agrees to pay the Monthly Base Rent for the first full calendar month of
the Term directly to Landlord concurrently with Tenant's delivery of the
executed Lease to Landlord.  If the Term of this Lease commences on a day other
than the first day of a calendar month, then the rent for such period will be
prorated in the proportion that the number of days this Lease is in effect
during such period bears to the number of days in such month and the excess
rent, if any, paid in advance by Tenant, shall be credited toward the rent due
for the next calendar month.  All rent must be paid to Landlord, without any
deduction or offset, in lawful money of the United States of America, at the
address designated by Landlord (and if no such address is designated, at the
address first set forth in Subsection 1(b)) or to such other person or at such
other place as Landlord may from time to time designate in writing. Monthly Base
Rent will be adjusted during the Term of this Lease as provided in Subsection
1(m).  All monthly installments of Monthly Base Rent shall be due and payable as
aforesaid whether or not Landlord shall have given Tenant any prior written
notice or bill with respect thereto, and Landlord shall have no obligation
whatsoever to give Tenant any written notice or bill with respect to any Monthly
Base Rent installment.

          (b)  Additional Rent.  All amounts and charges to be paid by Tenant
               ---------------                                               
hereunder, including, without limitation, payments for Operating Expenses,
insurance, repairs, parking and After-Hours HVAC charges, will be considered
"Additional Rent" for purposes of this Lease.  Monthly Base Rent and Additional
Rent and all other sums payable by Tenant under this Lease (collectively,
"Rent") shall be deemed to be and shall be treated as rent and shall be payable
and recoverable as rent, and Landlord shall have all rights against Tenant for
default in any payment of Additional Rent or such other sum as in the case of
non-payment of Monthly Base Rent.

          (c)  Late Payments.  Late payments of Monthly Base Rent and/or any 
               -------------   
item of additional rent will be subject to interest and a late charge as
provided in Subsection 22(f).

     6.   OPERATING EXPENSES.
          ------------------ 

          (a)  Operating  Expenses.  In addition to Monthly Base Rent, 
               -------------------   
throughout the Term of this Lease, Tenant agrees to pay Landlord as additional
rent in accordance with the terms of this Section 6, Tenant's Percentage (as
defined in Subsection 1(h) of Operating Expenses (as defined in Exhibit "E"
                                                                ------------
attached hereto) to the extent Tenant's Percentage of Operating Expenses exceeds
Tenant's Percentage of the Base Year Operating Expenses (as hereinafter
defined).

          (b)  Base Year Operating Expenses.  "Base Year Operating Expenses"
               ----------------------------                                 
shall mean the actual Operating Expenses for the Base Year set forth in
Subsection 1(u).

          (c)  Estimate Statement.  As soon as practicable after the expiration
               ------------------                                              
of the Base Year, and as soon as practicable after January 1st of each
subsequent calendar year during the Term of this Lease, Landlord will endeavor
to deliver to Tenant a statement ("Estimate Statement") wherein Landlord will
estimate both the Operating Expenses and Tenant's Percentage of Operating
Expenses for the then current calendar year.  If the estimate of Tenant's
Percentage of Operating Expenses in the Estimate Statement exceeds Tenant's
Percentage of Base Year Operating Expenses, Tenant agrees to pay Landlord, as
Additional Rent, one-twelfth (1/12th) of such excess each month thereafter,
beginning with the next installment of rent due, until such time as Landlord
issues a revised 

                                      -3-

 
Estimate Statement or the Estimate Statement for the succeeding calendar year,
except that, concurrently with the regular monthly rent payment next due
following the receipt of each such Estimate Statement, Tenant agrees to pay
Landlord an amount equal to one monthly installment of such excess (less any
applicable Operating Expenses already paid) multiplied by the number of months
from January, in the current calendar year, to the month of such rent payment
next due, all months inclusive.  If at any time and from time to time during the
Term of this Lease, Landlord reasonably determines that Tenant's Percentage of
Operating Expenses for the current calendar year will be greater than the amount
set forth in the then current Estimate Statement, Landlord may issue a revised
Estimate Statement and Tenant agrees to pay Landlord, within twenty (20) days of
receipt of the revised Estimate Statement the difference between the amount owed
by Tenant under such revised Estimate Statement and the amount owed by Tenant
under the original Estimate Statement for the portion of the then current
calendar year which has expired.  Thereafter Tenant agrees to pay Tenant's
Percentage of Operating Expenses based on such revised Estimate Statement until
Tenant receives the next calendar year's Estimate Statement or a new revised
Estimate Statement for the current calendar year.  In the event Tenant's
Percentage of Operating Expenses for any calendar year is less than Tenant's
Percentage of Base Year Operating Expenses, Tenant will not be entitled to a
credit against any rent, additional rent or Tenant's Percentage of future
Operating Expenses payable hereunder.

          (d)  Actual Statement.  As soon as practicable after expiration of the
               ----------------                                                 
calendar year following the Base Year, and as soon as practicable after
expiration of each subsequent calendar year during the Term of this Lease,
Landlord will also endeavor to deliver to Tenant a statement ("Actual
Statement") which states the actual Operating Expenses for the preceding
calendar year.  If the Actual Statement reveals that Tenant's Percentage of the
actual Operating Expenses is more than the total Additional Rent paid by Tenant
for Operating Expenses on account of the preceding calendar year, Tenant agrees
to pay Landlord the difference in a lump sum within thirty (30) days of receipt
of the Actual Statement.  If the Actual Statement reveals that Tenant's
Percentage of the actual Operating Expenses is less than the Additional Rent
paid by Tenant for Operating Expenses on account of the preceding calendar year,
Landlord will credit any overpayment toward the next monthly installment(s) of
Tenant's Percentage of the Operating Expenses due under this Lease.

          (e)  Miscellaneous.  Any delay or failure by Landlord in delivering 
               -------------       
any Estimate Statement or Actual Statement pursuant to this Section 6 will not
constitute a waiver of its right to require an increase in rent nor will it
relieve Tenant of its obligations pursuant to this Section 6, except that Tenant
will not be obligated to make any payments based on such Estimate Statement or
Actual Statement until twenty (20) days after receipt of such Estimate Statement
or Actual Statement.  Even though the Term has expired and Tenant has vacated
the Premises, when the final determination is made of Tenant's Percentage of the
actual Operating Expenses for the year in which this Lease terminates, Tenant
agrees to promptly pay any increase due over the estimated expenses paid and,
conversely, any overpayment made in the event said expenses decrease shall
promptly be rebated by Landlord to Tenant.  Prior to the expiration or sooner
termination of the Lease Term and Landlord's acceptance of Tenant's surrender of
the Premises, Landlord will have the right to estimate the actual Operating
Expenses for the then current Lease Year and to collect from Tenant prior to
Tenant's surrender of the Premises, Tenant's Percentage of any excess of such
actual Operating Expenses over the estimated Operating Expenses paid by Tenant
in such Lease Year. Notwithstanding anything to the contrary set forth in
Exhibit "E", when calculating the Base Year Operating Expenses, such Operating
- -----------                                                                   
Expenses shall not include any increase in Real Property Taxes and Assessments
attributable to special assessments, charges, costs, or fees, or due to
modifications or changes in governmental laws or regulations, including but not
limited to the institution of a split tax roll, and Base Year Operating Expenses
shall exclude market-wide labor-rate increases due to extraordinary
circumstances, including, but not limited to, boycotts and strikes, and utility
rate increases due to extraordinary circumstances including, but not limited to,
conservation surcharges, boycotts, embargoes or other shortages and amortized
costs relating to capital improvements.  If, in any Lease Year, the amount of
Real Property Taxes and Assessments attributable to the Project inclusive of
tenant improvements, decreases, then for purposes of all subsequent calendar
years, including the calendar year in which such decrease in Real Property Taxes
and Assessments occurred, Base Year Operating Expenses shall be decreased by an
amount equal to the decrease in Real Property Taxes and Assessments.

                                      -4-

 
          (f)  After-Hours HVAC.  In addition to Monthly Base Rent and Tenant's
               ----------------                                                
Percentage of Operating Expenses, Tenant agrees to pay Landlord the cost charged
by Landlord from time to time (which cost as of the date of this Lease is $17.00
per hour) for After-Hours HVAC used by Tenant, plus any costs to maintain the
HVAC system due to Tenants After-Hours HVAC usage. Landlord shall provide Tenant
a monthly invoice of the HVAC costs payable by Tenant, and Tenant shall pay for
such costs within twenty (20) days of receiving each invoice.

          (g)  Tenant's Audit Rights.  The information set out in the statements
               ---------------------                                            
submitted to Tenant pursuant to this Section 6 shall be binding on Tenant unless
Tenant gives written notice to Landlord within one hundred twenty (120) days
after Landlord's submission of such statement stating that Tenant intends to
cause Landlord's books and records (which shall include applicable back-up
information) with respect to the preceding calendar year to be audited by a
certified public accountant ("CPA"), or other qualified specialist approved in
advance by Landlord, qualified to audit said statements and reasonably
acceptable to Landlord, identifying the statement in question and setting out in
reasonable detail the reason why such statement should not be binding on Tenant.
If Tenant does not timely exercise its right to have Landlord's books and
records audited, or does not cause such audit to be accomplished within ninety
(90) days after notice of its election to do so, Tenant's right to object to any
such statement shall lapse.  Tenant shall pay all costs of such audit
(including, without limitation, any and all copying costs), unless the actual
amount of Additional Rent for the calendar year in question is properly
determined by the CPA to be five percent (5%) less than the amount of Additional
Rent for the same calendar year set forth in the statement submitted to Tenant
by Landlord, in which event Landlord shall pay the reasonable cost of such
audit.  Any such audit shall occur only in such offices and such location as
Landlord shall designate.  The amount of Additional Rent payable by Tenant to
Landlord shall be appropriately adjusted on the basis of such audit and, if the
audit shows that Landlord has overcharged Tenant, Landlord shall credit such
overcharge against the next installment of Additional Rent coming due hereunder.

     7.   SECURITY DEPOSIT.  Concurrently with Tenants execution of this Lease,
          ----------------                                                     
Tenant will deposit with Landlord the Security Deposit designated in Subsection
1(o).  The Security Deposit is in an amount equal to one hundred ten percent
(110%) of the highest Monthly Base Rent amount anticipated for the initial Lease
Term.  The Security Deposit will be held by Landlord as security for the full
and faithful performance by Tenant of all of the terms, covenants, and
conditions of this Lease to be kept and performed by Tenant during the Term
hereof.  If Tenant fully and faithfully performs its obligations under this
Lease, including, without limitation, surrendering the Premises upon the
expiration or sooner termination of this Lease in compliance with Subsection
11(a), the Security Deposit or any balance thereof will be returned to Tenant
(or, at Landlord's option, to the last assignee of Tenant's interest hereunder)
within thirty (30) days following the expiration of the Lease Term or as
required under applicable law, provided that Landlord may retain the Security
Deposit until such time as any outstanding rent or additional rent amount has
been determined and paid in full. The Security Deposit is not, and may not be
construed by Tenant to constitute, rent for the last month or any portion
thereof.  If Tenant defaults with respect to any provisions of this Lease
including, but not limited to, the provisions relating to the payment of rent or
additional rent, Landlord may (but will not be required to) use, apply or retain
all or any part of the Security Deposit for the payment of any rent or any other
sum in default, or for the payment of any other amount which Landlord may spend
or become obligated to spend by reason of Tenant's default or to compensate
Landlord for any loss or damage which Landlord may suffer by reason of Tenant's
default.  If any portion of the Security Deposit is so used or applied, Tenant
agrees, within ten (10) days after Landlord's written demand therefor, to
deposit cash with Landlord in an amount sufficient to restore the Security
Deposit to its original amount and Tenant's failure to do so shall constitute a
default under this Lease.  Landlord is not required to keep Tenant's Security
Deposit separate from its general funds, and Tenant is not entitled to interest
on such Security Deposit.  Should Landlord sell its interest in the Premises
during the Term hereof and deposit with the transferee thereof the then
unappropriated Security Deposit funds, Landlord will be discharged from any
further liability with respect to such Security Deposit, upon the assumption by
such Transferee of Landlord's obligations under this Lease.

     8.   USE.
          --- 

          (a)  Tenant's Use of the Premises.  The Premises may be used for the
               ----------------------------                                   
use or uses set forth in Subsection 1(r) only, and Tenant will not use or permit
the Premises to be used for any 

                                      -5-

 
other purpose without the prior written consent of Landlord, which consent
Landlord may withhold in its sole and absolute discretion.  Nothing in this
Lease will be deemed to give Tenant any exclusive right to such use in the
Building or the Project

          (b)  Compliance.  At Tenant's sole cost and expense, Tenant agrees to
               ----------                                                      
procure, maintain and hold available for Landlord's inspection, all governmental
licenses and permits required for the proper and lawful conduct of Tenant's
business from the Premises, if any.  Tenant agrees not to use, alter or occupy
the Premises or allow the Premises to be used, altered or occupied in violation
of, and Tenant, at its sole cost and expense, agrees to use and occupy the
Premises and cause the Premises to be used and occupied in compliance with: (i)
any and all laws, statutes, zoning restrictions, ordinances, rules, regulations,
orders and rulings now or hereafter in force and any requirements of any
insurer, insurance authority or duly constituted public authority having
jurisdiction over the Premises, the Building or the Project now or hereafter in
force, (ii) the requirements of the Board of Fire Underwriters and any other
similar body, (iii) the Certificate of Occupancy issued for the Building, and
(iv) any recorded covenants, conditions and restrictions and similar regulatory
agreements, if any, which affect the use, occupation or alteration of the
Premises, the Building and/or the Project Notwithstanding the foregoing,
Tenant's obligation to use and occupy the Premises in compliance with items (i)
through (iv) above shall not apply with respect to any noncompliance of the
Premises with items (i) through (iv) above existing on the date of delivery of
possession of the Premises to Tenant.  Landlord shall be responsible for
rectifying any such pre-existing noncompliance at Landlord's expense.  In
addition, Landlord shall construct the Tenant Improvements as described in
Exhibit "C" in conformity with all applicable codes and regulations of
- -----------                                                           
governmental authorities having jurisdiction over the Building and Premises and
with all valid building permits and other authorizations from appropriate
governmental agencies when required.  Tenant agrees to comply with the Rules and
Regulations referenced in Section 28.  Tenant agrees not to do or permit
anything to be done in or about the Premises which will in any manner obstruct
or interfere with the rights of other tenants or occupants of the Project, or
injure or unreasonably annoy them, or use or allow the Premises to be used for
any unlawful or unreasonably objectionable purpose.  Tenant agrees not to cause,
maintain or permit any nuisance or waste in or about the Premises or elsewhere
within the Project.  Tenant agrees not to place a load upon the Premises
exceeding the average pounds of live load per square foot of floor area
specified for the Building by Landlord's architect with the partitions to be
considered a part of the live load.  Landlord reserves the right to reasonably
prescribe the weight and positions of safes, files and heavy equipment which
Tenant desires to place in the Premises so as to distribute properly the weight
thereof.  Tenant agrees to install, maintain and use Tenant's business machines
and mechanical equipment which may cause vibration or noise that may be
transmitted to the Building structure or to any other space in the Building in a
manner so as to eliminate or minimize such vibration or noise.  Tenant will be
responsible for all structural engineering required to determine structural
load, as well as the expense thereof.  Notwithstanding anything contained in
this Lease to the contrary, all transferable development rights related in any
way to the Project are and will remain vested in Landlord, and Tenant hereby
waives any rights thereto.  Without limiting the foregoing or any other
provisions of this Lease, Tenant shall be solely responsible for and shall
comply with, at Tenant's sole cost and expense, all requirements of Title III of
the Americans with Disabilities Act of 1990 (the "ADA") applicable to Tenant's
use and occupancy of the Premises, including, without limitation, those
provisions of the ADA applicable to the operational policies and activities of
Tenant in the Premises and those applicable to the non-structural design and
construction elements of any improvements in or to the Premises constructed by
or on behalf of Tenant after delivery of possession of the Premises (i.e.,
excluding only the initial Tenant Improvements to be constructed by Landlord
pursuant to Exhibit "C" and other improvements existing within the Premises
            -----------                                                    
prior to the date of delivery of possession of the Premises to Tenant unless
applicable thereto as a result of additional improvements or alterations
constructed by or on behalf of Tenant).

          (c)  Hazardous Materials.  Except for ordinary and general office
               -------------------                                         
supplies typically used in the ordinary course of business within office
buildings, such as copier toner, liquid paper, glue, ink and common household
cleaning materials (some or all of which may constitute "Hazardous Materials" as
defined in this Lease), Tenant agrees not to cause or permit any Hazardous
Materials to be brought upon, stored, used, handled, generated, released or
disposed of on, in, under or about the Premises, the Building, the Common Areas
or any other portion of the Project by Tenant, its agents, employees,
subtenants, assignees, contractors or invitees (collectively, "Tenant's
Parties"), without the prior written consent of Landlord, which consent Landlord
may withhold in its sole and absolute 

                                      -6-

 
discretion.  Upon the expiration or sooner termination of this Lease, Tenant
agrees to remove from the Premises, the Building and the Project, at its sole
cost and expense, any and all Hazardous Materials, including any equipment or
systems containing Hazardous Materials which are installed, brought upon,
stored, used, generated or released upon, in or under the Premises, the Building
and/or the Project or any portion thereof by Tenant or any of Tenant's Parties.
To the fullest extent permitted by law, Tenant agrees to promptly indemnify,
protect, defend and hold harmless Landlord and Landlord's partners, officers,
directors, employees, agents, successors and assigns (collectively, "Landlord
Indemnified Parties") from and against any and all claims, damages, judgments,
suits, causes of action, losses, liabilities, penalties, fines, expenses and
costs (including, without limitation, clean-up, removal, remediation and
restoration costs, sums paid in settlement of claims, attorneys' fees,
consultant fees and expert fees and court costs) which arise or result from the
presence of Hazardous Materials on, in or about the Premises, the Building or
any other portion of the Project and which are caused or permitted by Tenant or
any of Tenant's Parties.  Tenant agrees to promptly notify Landlord of any
release of Hazardous Materials in the Premises, the Building or any other
portion of the Project which Tenant becomes aware of during the Term of this
Lease, whether caused by Tenant or any other persons or entities.  In the event
of any release of Hazardous Materials caused or permitted by Tenant or any of
Tenant's Parties, Landlord shall have the right to cause Tenant to immediately
take all steps Landlord deems necessary or appropriate to remediate such release
and prevent any similar future release to the satisfaction of Landlord and
Landlord's mortgagee(s).  As used in this Lease, the term "Hazardous Materials"
shall mean and include any hazardous or toxic materials, substances or wastes as
now or hereafter designated under any law, statute, ordinance, rule, regulation,
order or ruling of any agency of the State, the United States Government or any
local governmental authority, including, without limitation, asbestos,
petroleum, petroleum hydrocarbons and petroleum based products, urea
formaldehyde foam insulation, polychlorinated biphenyls ("PCBs"), and freon and
other chlorofluorocarbons.  The provisions of this Subsection 8(c) will survive
any termination of this Lease.

     9.   NOTICES.  All notices required or permitted by this Lease shall be in
          -------                                                              
writing and may be delivered (a) in person (by hand, by messenger or by courier
service), (b) by U.S. Postal Service Express Mail, Federal Express or other
overnight courier, or (c) by facsimile transmission, and shall be deemed
sufficiently given if served in a manner specified in this Section 9. The
addresses set forth in Subsections l(b) and l(d) of this Lease shall be the
address of each party for notice purposes. Landlord or Tenant may by written
notice to the other specify a different address for notice purposes, except that
upon Tenant's taking possession of the Premises, the Premises shall constitute
Tenant's address for the purpose of mailing or delivering notices to Tenant;
provided, however, that a copy of such notice shall also be sent to the address
for copies specified in Subsection 1(d).  A copy of all notices required or
permitted to be given to Landlord hereunder shall be concurrently transmitted to
such party or parties at such addresses as Landlord may from time to time
hereinafter designate by written notice to Tenant.  Notices delivered by U.S.
Express Mail, Federal Express or other courier shall be deemed given on the date
delivered by the carrier to the appropriate party's address for notice purposes.
If any notice is transmitted by facsimile transmission, the notice shall be
deemed delivered upon telephone confirmation of receipt of the transmission
thereof at the appropriate party's address for notice purposes.  If notice is
received on Saturday, Sunday or a legal holiday, it shall be deemed received on
the next business day.  Nothing contained herein shall be construed to limit
Landlord's right to serve any notice to pay rent or quit or similar notice by
any method permitted by applicable law, and any such notice shall be effective
if served in accordance with any method permitted by applicable law whether or
not the requirements of this Section have been met.

     10.  BROKERS.  The parties acknowledge that the broker(s) who negotiated
          -------                                                            
this Lease are stated in Subsection l(v).  Each party represents and warrants to
the other, that to its knowledge, no other broker, agent or finder (a)
negotiated or was instrumental in negotiating or consummating this Lease on its
behalf, and (b) is or might be entitled to a commission or compensation in
connection with this Lease.  Landlord and Tenant each agree to promptly
indemnify, protect, defend and hold harmless the other from and against any and
all claims, damages, judgments, suits, causes of action, losses, liabilities,
penalties, fines, expenses and costs (including attorneys' fees and court costs)
resulting from any breach by the indemnifying party of the foregoing
representation, including, without limitation, any claims that may be asserted
by any broker, agent or finder undisclosed by the indemnifying party.  The
foregoing mutual indemnity shall survive the expiration or earlier termination
of this Lease.

                                      -7-

 
     11.  SURRENDER; HOLDING OVER.
          ----------------------- 

          (a)  Surrender.  The voluntary or other surrender of this Lease by
               ---------                                                    
Tenant, or a mutual cancellation thereof, shall not constitute a merger, and
shall, at the option of Landlord, operate as an assignment to Landlord of any or
all subleases or subtenancies.  Upon the expiration or sooner termination of
this Lease, Tenant agrees to peaceably surrender the Premises to Landlord broom
clean and in a state of first-class order, repair and condition, ordinary wear
and tear and casualty damage (if this Lease is terminated as a result thereof
pursuant to Section 20) excepted, with all of Tenant's personal property and
Alterations (as defined in Section 13) removed from the Premises to the extent
required under Section 13 and all damage caused by such removal repaired as
required by Section 13.  Prior to the date Tenant is to actually surrender the
Premises to Landlord, Tenant agrees to give Landlord reasonable prior notice of
the exact date Tenant will surrender the Premises so that Landlord and Tenant
can schedule a walk-through of the Premises to review the condition of the
Premises and identify the Alterations and personal property which Tenant is to
remove and any repairs Tenant is to make upon surrender of the Premises.  The
delivery of keys to any employee of Landlord or to Landlord's agent or any
employee thereof alone will not be sufficient to constitute a termination of
this Lease or a surrender of the Premises.

          (b)  Holding Over.  Tenant will not be permitted to hold over
               ------------                                            
possession of the Premises after the expiration or earlier termination of the
Term without the express written consent of Landlord, which consent Landlord may
withhold in its sole discretion.  If Tenant holds over after the expiration or
earlier termination of the Term, Landlord may, at its option, treat Tenant as a
tenant at sufferance only, and such continued occupancy by Tenant shall be
subject to all of the terms, covenants and conditions of this Lease, so far as
applicable, except that the Monthly Base Rent for any such holdover period shall
be equal to one hundred twenty five percent (125%) of the Monthly Base Rent in
effect under this Lease immediately prior to such holdover, prorated on a daily
basis; Acceptance by Landlord of rent after such expiration or earlier
termination will not result in a renewal of this Lease.  The foregoing
provisions of this Section 11 are in addition to and do not affect Landlord's
right of re-entry or any rights of Landlord under this Lease or as otherwise
provided by law.  If Tenant fails to surrender the Premises upon the expiration
of this Lease in accordance with the terms of this Section 11 despite demand to
do so by Landlord, Tenant agrees to promptly indemnify, protect, defend and hold
Landlord harmless from all claims, damages, judgments, suits, causes of action,
losses, liabilities, penalties, fines, expenses and costs (including attorneys'
fees and costs), including, without limitation, costs and expenses incurred by
Landlord in returning the Premises to the condition in which Tenant was to
surrender it and claims made by any succeeding tenant founded on or resulting
from Tenant's failure to surrender the Premises.

     12.  TAXES ON TENANT'S PROPERTY.  Tenant agrees to pay before delinquency
          --------------------------                                          
all taxes and assessments (real and personal) levied against (a) any personal
property or trade fixtures placed by Tenant in or about the Premises (including
any increase in the assessed value of the Premises based upon the value of any
such personal property or trade fixtures); and (b) any Tenant Improvements or
Alterations (as defined in Section 13) in the Premises (whether installed and/or
paid for by Landlord or Tenant) to the extent such items are assessed at a
valuation higher than the valuation at which tenant improvements conforming to
Landlord's building standard tenant improvements are assessed.  If any such
taxes or assessments are levied against Landlord or Landlord's property,
Landlord may, after written notice to Tenant (and under proper protest if
requested by Tenant) pay such taxes and assessments, in which event Tenant
agrees to reimburse Landlord all amounts paid by Landlord within ten (10)
business days after demand by Landlord. Landlord shall promptly deliver to
Tenant a copy of any tax or assessment bill received by Landlord that sets forth
amounts owing by Tenant pursuant to this Section 12.

     13.  ALTERATIONS.  After installation of the initial Tenant Improvements
          -----------                                                        
for the Premises pursuant to Exhibit "C", Tenant may, at its sole cost and
                             -----------                                  
expense, make alterations, additions, improvements and decorations to the
Premises (collectively, "Alterations") subject to and upon the following terms
and conditions:

          (a)  Except as set forth in the approved Plans for the Tenant
Improvements pursuant to Exhibit "C", Tenant may not make any Alterations
                         -----------                                     
(without Landlord's prior written consent which may be withheld in Landlord's
sole discretion), which: (i) affect any area outside the 

                                      -8-

 
Premises; (ii) affect the Building's structure, equipment, services or systems,
or the proper functioning thereof, or Landlord's access thereto; (iii) affect
the outside appearance, character or use of the Building or the Building Common
Areas; (iv) in the reasonable opinion of Landlord, lessen the value of the
Building; or (v) will violate or require a change in any occupancy certificate
applicable to the Premises.

          (b)  Before proceeding with any Alterations which are not prohibited
in Subsection 13(a), Tenant must first obtain Landlord's written approval of the
plans, specifications and working drawings for such Alterations, which approval
Landlord will not unreasonably withhold or delay; provided, however, Landlord's
prior approval will not be required for any such Alterations which are not
prohibited by Subsection 13(a) and which cost less than Seven Thousand Five
Hundred Dollars ($7,500) as long as (i) Tenant delivers to Landlord notice and a
copy of any final plans, specifications and working drawings for any such
Alterations at least ten (10) days prior to commencement of the work thereof,
and (ii) the other conditions of this Section 13 are satisfied, including,
without limitation, conforming to Landlord's rules, regulations and insurance
requirements which govern contractors.  Landlord's approval of plans,
specifications and/or working drawings for Alterations will not create any
responsibility or liability on the part of Landlord for their completeness,
design sufficiency, or compliance with applicable permits, laws, rules and
regulations of governmental agencies or authorities, and (iii) such alterations
are nonstructural and primarily of a cosmetic nature such as (without
limitation) painting or carpeting.  In approving any Alterations, Landlord
reserves the right to reasonably require Tenant to increase its Security Deposit
to provide Landlord with additional reasonable security for the proper
installation and removal of such Alterations by Tenant as may be required by
this Lease.

          (c)  Alterations may be made or installed only by contractors and
subcontractors which have been approved by Landlord, which approval Landlord
will not unreasonably withhold or delay; provided, however, Landlord reserves
the right to require that Landlord's designated contractor(s) for the Building
be given the first opportunity to bid for any Alteration work.  Before
proceeding with any Alterations, Tenant agrees to provide Landlord with ten (10)
days' prior written notice and Tenant's contractors must obtain, on behalf of
Tenant and at Tenant's sole cost and expense: (i) all necessary governmental
permits and approvals for the commencement and completion of such Alterations;
and (ii) if reasonably requested by Landlord, a completion and lien indemnity
bond, or other surety, reasonably satisfactory to Landlord for such Alterations.
Throughout the performance of any Alterations, Tenant agrees to obtain, or cause
its contractors to obtain, workers compensation insurance and general liability
insurance in compliance with the provisions of Section 19 of this Lease.

          (d)  All Alterations must be performed: (i) in accordance with the
approved plans, specifications and working drawings; (ii) in a lien-free and
first-class and workmanlike manner, (iii) in compliance with all applicable
permits, laws, statutes, ordinances, rules, regulations, orders and rulings now
or hereafter in effect and imposed by any governmental agencies and authorities
which assert jurisdiction; (iv) in such a manner so as not to interfere with the
occupancy of any other tenant in the Building, nor impose any additional expense
upon nor delay Landlord in the maintenance and operation of the Building; and
(v) at such times, in such manner, and subject to such rules and regulations as
Landlord may from time to time reasonably designate.

          (e)  The Tenant Improvements, including, without limitation, all
affixed sinks, dishwashers and other fixtures, and all Alterations will become
the property of Landlord and will remain upon and be surrendered with the
Premises at the end of the Term of this Lease; provided, however, Tenant shall,
prior to the end of the Term, remove such of the Alterations in the Premises as
Landlord shall direct to be removed by Tenant by written notice provided that
Landlord notified Tenant at the time Tenant requested approval for the
Alteration in question that removal thereof would be required at the end of the
Term.  Landlord may also require Tenant to remove Alterations which Landlord did
not have the opportunity to approve as provided in this Section 13.  If Landlord
requires Tenant to remove any Alterations, which Landlord has the right to
request to remove as set forth above, Tenant, at its sole cost, agrees to remove
the identified Alterations on or before the expiration or sooner termination of
this Lease and repair any damage to the Premises caused by such removal.

                                      -9-

 
          (f)  Tenant agrees to pay Landlord, as additional rent, the reasonable
costs of professional services and costs for general conditions of Landlord's
third party consultants if utilized by Landlord for review of all plans,
specifications and working drawings for any Alterations, within ten (10)
business days after Tenant's receipt of invoices either from Landlord or such
consultants.  In addition, Tenant agrees to pay Landlord, within twenty (20)
days after completion of any Alterations, a fee to cover Landlord's costs of
supervising and administering the installation of such Alterations (provided
Landlord actually supervises or administers such installation), in the amount of
five percent (5%) of the cost of such Alterations.

          (g)  All articles of personal property owned by Tenant or installed by
Tenant at its expense in the Premises (including Tenant's business and trade
fixtures, furniture, movable partitions and equipment (such as telephones, copy
machines, computer terminals, refrigerators and facsimile machines) will be and
remain the property of Tenant and must be removed by Tenant from the Premises,
at Tenant's sole cost and expense, on or before the expiration or sooner
termination of this Lease.  Tenant agrees to repair any damage caused by such
removal at its cost on or before the expiration or sooner termination of this
Lease.

          (h)  If Tenant fails to remove by the expiration or sooner termination
of this Lease all of its personal property, or any Alterations identified by
Landlord for removal, Landlord may (without liability to Tenant for loss thereto
treat such failure as a hold-over pursuant to Subsection 11(b), and/or treat
such personal property and/or Alterations as abandoned and, at Tenant's sole
cost and in addition to Landlord's other rights and remedies under this Lease
at law or in equity: (a) remove and store such items; and/or (b) upon twenty
(20) days' prior notice to Tenant, sell, discard or otherwise dispose of all or
any such items at private or public sale for such price as Landlord may obtain
or by other commercially reasonable means.  Tenant shall be liable for all costs
of disposition of Tenant's abandoned property and Landlord shall have no
liability to Tenant with respect to any such abandoned property.  Landlord
agrees to apply the proceeds of any sale of any such property to any amounts due
to Landlord under this Lease from Tenant (including Landlord's attorneys' fees
and other costs incurred in the removal, storage and/or sale of such items),
with any remainder to be paid to Tenant

     14.  REPAIRS.
          ------- 

          (a)  Landlord's Obligations.  Landlord agrees to repair and maintain
               ----------------------                                         
the structural portions of the Building and the plumbing, heating, ventilating,
air conditioning, elevator and electrical systems installed or furnished by
Landlord, unless such maintenance and repairs are (i) attributable to items
installed in Tenant's Premises which are above standard interior improvements
(such as, for example, custom lighting, special HVAC and/or electrical panels or
systems, kitchen or restroom facilities and appliances constructed or installed
within Tenant's Premises) or (ii) caused in part or in whole by the act, neglect
or omission of any duty by Tenant, its agents, servants, employees or invitees,
in which case Tenant will pay to Landlord, as additional rent, the reasonable
cost of such maintenance and repairs.  Landlord will not be liable for any
failure to make any such repairs or to perform any maintenance unless such
failure shall persist for an unreasonable time after written notice of the need
of such repairs or maintenance is given to Landlord by Tenant.  Except as
provided in Section 20, Tenant shall not be entitled to any abatement of rent
and Landlord will not have any liability by reason of any injury to or
interference with Tenant's business arising from the making of any repairs,
alterations or improvements in or to any portion of the Building or the Premises
or in or to fixtures, appurtenances and equipment therein.  Tenant waives the
right to make repairs at Landlord's expense under any law, statute, ordinance,
rule, regulation, order or ruling (including, without limitation, the provisions
of California Civil Code Sections 1941 and 1942 and any successor statutes or
laws of a similar nature).

          (b)  Tenant's Obligations.  Except for matters which are Landlord's
               --------------------                                          
obligation as specified in Subsection 14(a), Tenant agrees to keep, maintain and
preserve the Premises in first class condition and repair, normal wear and tear
excepted, and, when and if needed, at Tenant's sole cost and expense, to make
all repairs to the Premises and every part thereof.  Any such maintenance and
repairs will be performed by Landlord's contractor, or at Landlord's option, by
such contractor or contractors as Tenant may choose from an approved list to be
submitted by Landlord.  Tenant agrees to pay all costs and expenses incurred in
such maintenance and repair within twenty (20) days after 

                                     -10-

 
billing by Landlord or such contractor or contractors.  Tenant agrees to cause
any mechanics' liens or other liens arising as a result of work performed by
Tenant or at Tenant's direction to be eliminated as provided in Section 15.
Except as provided in Subsection 14(a), Landlord has no obligation to alter,
remodel, improve, repair, decorate or paint the Premises or any part thereof.

          (c)  Tenant's Failure to Repair.  If Tenant refuses or neglects to
               --------------------------                                   
repair and maintain the Premises properly as required hereunder to the
reasonable satisfaction of Landlord, Landlord, at any time following ten (10)
days from the date on which Landlord makes a written demand on Tenant to effect
such repair and maintenance, may enter upon the Premises and make such repairs
and/or maintenance, and upon completion thereof, Tenant agrees to pay to
Landlord as additional rent Landlord's costs for making such repairs plus an
amount not to exceed ten percent (10%) of such costs for overhead, within twenty
(20) days of receipt from Landlord of a written demised bill therefor.  Any
amounts not reimbursed by Tenant within such twenty (20) day period will bear
interest at the Interest Rate until paid by Tenant.

     15.  LIENS.  Tenant agrees not to permit any mechanic's, materialmen's or
          -----                                                               
other liens to be filed against all or any part of the Project, the Building or
the Premises, nor against Tenant's leasehold interest in the Premises, by reason
of or in connection with any repairs, alterations, improvements or other work
contracted for or undertaken by Tenant or any other act or omission of Tenant or
Tenant's agents, employees, contractors, licensees or invitees.  At Landlord's
request Tenant agrees to provide Landlord with enforceable, conditional and
final lien releases (or other evidence reasonably requested by Landlord to
demonstrate protection from liens) from all persons furnishing labor and/or
materials at the Premises.  Landlord will have the right at all reasonable times
to post on the Premises and record any notices of non-responsibility which it
deems necessary for protection from such liens.  If any such liens are filed,
Tenant will, at its sole cost, promptly cause such liens to be released of
record or bonded so that it no longer affects title to the Project, the Building
or the Premises.  If Tenant fails to cause any such liens to be so released or
bonded within thirty (30) days after notice of the filing thereof, such failure
will be deemed a material breach by Tenant under this Lease without the benefit
of any additional notice or cure period described in Section 22, and Landlord
may, without waiving its rights and remedies based on such breach, and without
releasing Tenant from any of its obligations, cause such liens to be released by
any means it shall deem proper, including payment in satisfaction of the claims
giving rise to such liens.  Tenant agrees to pay to Landlord within ten (10)
days after receipt of invoice from Landlord, any sum paid by Landlord to remove
such liens, together with interest at the Interest Rate from the date of such
payment by Landlord.

     16.  ENTRY BY LANDLORD.  Landlord and its employees and agents will at all
          -----------------                                                    
times, upon 24 hours prior notice except in emergencies, have the right to enter
the Premises to inspect the same, to supply janitorial service and any other
service to be provided by Landlord to Tenant hereunder, to show the Premises to
prospective purchasers or tenants, to post notices of nonresponsibility, and/or
to repair the Premises as permitted or required by this Lease.  In exercising
such entry rights, Landlord will endeavor to minimize, as reasonably
practicable, the interference with Tenant's business, and will provide Tenant
with reasonable advance notice of any such entry (except in emergency
situations).  Landlord may, in order to carry out such purposes, erect
scaffolding and other necessary structures where reasonably required by the
character of the work to be performed. Landlord will at all times have and
retain a key with which to unlock all doors in the Premises, excluding Tenant's
vaults and safes.  Landlord will have the right to use any and all means which
Landlord may reasonably deem proper to open said doors in an emergency in order
to obtain entry to the Premises.  Any entry to the Premises obtained by Landlord
by any of said means, or otherwise, will not be construed or deemed to be a
forcible or unlawful entry into the Premises, or an eviction of Tenant from the
Premises.  Landlord will not be liable to Tenant for any damages or losses for
any entry by Landlord.

     17.  UTILITIES AND SERVICES.  Landlord agrees to furnish or cause to be
          ----------------------                                            
furnished to the Premises the utilities and services described in the Standards
for Utilities and Services attached hereto as Exhibit "F", subject to the
                                              -----------                
conditions and in accordance with the standards set forth therein. Landlord may
require Tenant from time to time to provide Landlord with a list of Tenant's
employees and/or agents which are authorized by Tenant to subscribe on behalf of
Tenant for any additional services which may be provided by Landlord.  Any such
additional services will be provided to Tenant 

                                     -11-

 
at Tenant's cost.  Landlord will not be liable to Tenant for any failure to
furnish any of the foregoing utilities and services if such failure is caused by
all or any of the following: (i) accident, breakage or repairs; (ii) strikes,
lockouts or other labor disturbance or labor dispute of any character, (iii)
governmental regulation, moratorium or other governmental action or inaction;
(iv) inability despite the exercise of reasonable diligence to obtain
electricity, water or fuel; or (v) any other cause beyond Landlord's reasonable
control.  In addition, in the event of any stoppage or interruption of services
or utilities, Tenant shall not be entitled to any abatement or reduction of rent
(except as expressly provided in Exhibit "F" and, except as expressly provided
                                 -----------
in Subsection 20(f) or Subsection 21(b), if such failure results from a damage
or taking described therein), no eviction of Tenant will result from such
failure and Tenant will not be relieved from the performance of any covenant or
agreement in this Lease because of such failure.  In the event of any failure,
stoppage or interruption thereof, Landlord agrees to diligently attempt to
resume service promptly.  If Tenant requires or utilizes more water or
electrical power than is considered reasonable or normal by Landlord, as
described under Exhibit "F", Landlord may at its option require Tenant to pay, 
                -----------              
as additional rent, the cost, as fairly determined by Landlord, incurred by such
extraordinary usage and/or Landlord may install separate meter(s) for the
Premises, at Tenant's sole expense, and Tenant agrees thereafter to pay all
charges of the utility providing service and Landlord will make an appropriate
adjustment to Tenant's Operating Expenses calculation to account for the fact
Tenant is directly paying such metered charges, provided Tenant will remain
obligated to pay its proportionate share of Operating Expenses subject to such
adjustment.

     18.  ASSUMPTION OF RISK AND INDEMNIFICATION.
          -------------------------------------- 

          (a)  Tenant's Assumption of Risk and Waiver.  Tenant as a material 
               --------------------------------------   
part of the consideration to Landlord, hereby agrees that neither Landlord nor
any Landlord Indemnified Parties (as hereinafter defined) will be liable to
Tenant for, and Tenant expressly assumes the risk of and waives any and all
claims it may have against Landlord or any Landlord Indemnified Parties with
respect to, any and all loss or damage to property or injury to persons in, upon
or about the Premises, the Building or the Project resulting from any cause
whatsoever, including, without limitation, any such loss, damage or injury
caused by other tenants or persons in or about the Building or the Project,
caused to property entrusted to employees of the Building, caused by theft or
otherwise, or resulting from any casualty, explosion, falling plaster or other
masonry or glass, steam, gas, electricity, water or rain which may leak from any
part of the Building or any other portion of the Project or from the pipes,
appliances or plumbing works therein or from the roof, street or subsurface or
from any other place, or resulting from dampness; provided, however, that
Landlord shall nevertheless be responsible to the extent and in the proportion
that any such loss, damage or injury is ultimately determined to be caused by
Landlord's gross negligence or willful misconduct; provided, further, however,
that notwithstanding anything to the contrary contained in this Lease, neither
Landlord nor any Landlord Indemnified Parties will be liable for consequential
damages arising out of any loss of the use of the Premises or any equipment or
facilities therein by Tenant or any Tenant Parties or for interference with
light or other incorporeal hereditaments.  Tenant agrees to give prompt notice
to Landlord in case of fire or accidents in the Premises or the Building, or of
defects therein or in the fixtures or equipment.

          (b)  Indemnification.  Tenant will be liable for, and agrees to
               ---------------                                           
promptly indemnity, protect, defend and hold harmless Landlord and Landlord's
affiliates, partners, officers, directors, employees, agents, successors and
assigns (collectively, "Landlord Indemnified Parties"), from and against any and
all claims, damages, judgments, suits, causes of action, losses, liabilities,
penalties, fines, expenses and costs, including attorneys' fees and court costs
(collectively, "Indemnified Claims"), arising or resulting from (i) any act or
omission of Tenant or any of Tenant's agents, employees, contractors,
subtenants, assignees, licensees or invitees (collectively, "Tenant Parties");
(ii) the use of the Premises and Common Areas and conduct of Tenant's business
by Tenant or any Tenant Parties, or any other activity, work or thing done,
permitted or suffered by Tenant or any Tenant Parties, in or about the Premises,
the Building or elsewhere within the Project; and/or (iii) any default by Tenant
of any obligations on Tenant's part to be performed under the terms of this
Lease. Notwithstanding the foregoing, Tenant shall not be liable to the extent
and in the proportion that damage or injury is ultimately determined to be
caused by the gross negligence or willful misconduct of Landlord.  In case any
action or proceeding is brought against Landlord or any Landlord Indemnified
Parties by reason of any such Indemnified Claims, Tenant, upon notice from
Landlord, 

                                     -12-

 
agrees to defend the same at Tenant's expense by counsel approved in writing by
Landlord, which approval Landlord will not unreasonably withhold. Landlord shall
indemnify, defend and hold harmless Tenant and its affiliates, partners,
officers, directors, employees, agents, successors and assigns from and against
any and all claims, damages, judgments, suits, causes of action, losses,
liabilities, penalties, fines, expenses and costs, including attorneys' fees and
court costs arising or resulting from injuries to or death of any person or
damage to any property arising out of any occurrence on or in the Common Areas,
to the extent proximately caused by the gross negligence or willful misconduct
of Landlord.

          (c)  Survival; No Release of Insurers.  Landlord's and Tenant's
               --------------------------------                          
indemnification obligations under Subsection 18(b) will survive the expiration
or earlier termination of this Lease. Landlord's and Tenant's covenants,
agreements and indemnification obligation in Subsection 18(a) and Subsection
18(b), are not intended to and will not relieve any insurance carrier of its
obligations under policies carried or required to be carried by Tenant pursuant
to the provisions of this Lease.

     19.  INSURANCE.
          --------- 

          (a)  Tenant's Insurance.  On or before the earlier to occur of (i)
               ------------------                                           
thirty (30) days after Tenant executes the Lease, or (ii) the date Tenant
commences any work of any type in the Premises pursuant to this Lease (which may
be prior to the Commencement Date), and continuing throughout the entire Term
hereof and any other period of occupancy, Tenant agrees to keep in full force
and effect, at its sole cost and expense, the following insurance:

               (i)    "All Risks" property insurance including at least the
     following perils: fire and extended coverage, smoke damage, vandalism,
     malicious mischief, sprinkler leakage (including earthquake sprinkler
     leakage).  This insurance policy must be upon all property owned by Tenant,
     for which Tenant is legally liable, or which is installed at Tenant's
     expense, and which is located in the Building including, without
     limitation, any Tenant Improvements which satisfy the foregoing
     qualification and any Alterations, and all furniture, fittings,
     installations, fixtures and any other personal property of Tenant in an
     amount not less than the full replacement cost thereof.  If there is a
     dispute as to full replacement cost, the decision of Landlord or any
     mortgagee of Landlord will be presumptive.

               (ii)   One (1) year insurance coverage for business interruption
     and loss of income and extra expense insuring the same perils described in
     Subsection 19(a)(i), in such amounts as will reimburse Tenant for any
     direct or indirect loss of earnings attributable to any such perils
     including prevention of access to the Premises, Tenant's parking areas or
     the Building as a result of any such perils.

               (iii)  Commercial Public Liability Insurance or Comprehensive
     General Liability Insurance (on an occurrence form) insuring bodily injury,
     personal injury and property damage including the following divisions and
     extensions of coverage: Premises and Operations; Owners and Contractors
     protective; blanket contractual liability (including coverage for Tenant's
     indemnity obligations under this Lease); products and completed operations;
     liquor liability (if Tenant serves alcohol on the Premises); and fire and
     water damage legal liability in an amount sufficient to cover the
     replacement value of the Premises, including Tenant Improvements, that are
     rented under the terms of this Lease.  Such insurance must have the
     following minimum limits of liability: bodily injury, personal injury and
     property damage - $2,000,000 each occurrence, provided that if liability
     coverage is provided by a Commercial General Liability policy the general
     aggregate limit shall apply separately and in total to this location only
     (per location general aggregate), and provided further, such minimum limits
     of liability may be adjusted from year to year to reflect increases in
     coverages as recommended by Landlord's insurance carrier as being prudent
     and commercially reasonable for tenants of first class office buildings
     comparable to the Building, rounded to the nearest five hundred thousand
     dollars.

               (iv)   Comprehensive Automobile Liability insuring bodily injury
     and property damage arising from all owned, non-owned and hired vehicles,
     if any, with minimum limits of liability of $2,000,000 per accident.

                                     -13-

 
               (v)    Worker's Compensation as required by the laws of the State
     of California with the following minimum limits of liability: Coverage A -
     statutory benefits; Coverage B - $1,000,000 per accident and disease.

               (vi)   Any other form or forms of insurance as Tenant or Landlord
     or any mortgagees of Landlord may reasonably require from time to time in
     form, in amounts, and for insurance risks against which, a prudent tenant
     would protect itself, but only to the extent coverage for such risks and
     amounts are available in the insurance market at commercially acceptable
     rates.  Landlord makes no representation that the limits of liability
     required to be carried by Tenant under the terms of this Lease are adequate
     to protect Tenant's interests and Tenant should obtain such additional
     insurance or increased liability limits as Tenant deems appropriate.

          (b)  Supplemental Tenant Insurance Requirements.
               ------------------------------------------ 

               (i)    All policies must be in a form reasonably satisfactory to
     Landlord and issued by an insurer admitted to do business in the State of
     California.

               (ii)   All policies must be issued by insurers with a
     policyholder rating of "A" and a financial rating of "X" in the most recent
     version of Bests Key Rating Guide.

               (iii)  All policies must contain a requirement to notify Landlord
     (and Landlord's property manager and any mortgagees or ground lessors of
     Landlord who are named as additional insureds, if any) in writing not less
     than thirty (30) days prior to any material change, reduction in coverage,
     cancellation or other termination thereof.  Tenant agrees to deliver to
     Landlord, as soon as practicable after placing the required insurance, but
     in any event within the time frame specified in Subsection 19(a),
     certificate(s) of insurance and/or if required by Landlord, certified
     copies of each policy evidencing the existence of such insurance and
     Tenant's compliance with the provisions of this Section 19.  Tenant agrees
     to cause replacement policies or certificates to be delivered to Landlord
     not less than thirty (30) days prior to the expiration of any such policy
     or policies.  If any such initial or replacement policies or certificates
     are not furnished within the time(s) specified herein, Tenant will be
     deemed to be in material default under this Lease without the benefit of
     any additional notice or cure period provided in Subsection 22(a)(iii), and
     Landlord will have the right, but not the obligation, to procure such
     insurance as Landlord deems necessary to protect Landlord's interests at
     Tenant's expense.  If Landlord obtains any insurance that is the
     responsibility of Tenant under this Section 19, Landlord agrees to deliver
     to Tenant a written statement setting forth the cost of any such insurance
     and showing in reasonable detail the manner in which it has been computed
     and Tenant agrees to promptly reimburse Landlord for such costs as
     additional rent.

               (iv)   General Liability and Automobile Liability policies under
     Subsection 19(a)(iii) and Subsection 19(a)(iv) must name Landlord and
     Landlord's property manager (and at Landlord's request Landlord's
     mortgagees and ground lessors of which Tenant has been informed in writing)
     as additional insureds and must also contain a provision that the insurance
     afforded by such policy is primary insurance and any insurance carried by
     Landlord and Landlord's property manager or Landlord's mortgagees or ground
     lessors, if any, will be excess over and non-contributing with Tenant's
     insurance.

          (c)  Tenant's Use.  Tenant will not keep, use, sell or offer for sale
               ------------                                                    
in or upon the Premises any article which may be prohibited by any insurance
policy periodically in force covering the Building or the Project Common Areas.
If Tenant's occupancy or business in, or on, the Premises, whether or not
Landlord has consented to the same, results in any increase in premiums for the
insurance periodically carried by Landlord with respect to the Building or the
Project Common Areas or results in the need for Landlord to maintain special or
additional insurance, Tenant agrees to pay Landlord the cost of any such
increase in premiums or special or additional coverage as additional rent within
ten (10) days after being billed therefor by Landlord.  In determining whether
increased premiums are a result of Tenant's use of the Premises, a schedule
issued by the organization computing the insurance rate on the Building, the
Project Common Areas or the Tenant 

                                     -14-

 
Improvements showing the various components of such rate, will be conclusive
evidence of the several items and charges which make up such rate.  Tenant
agrees to promptly comply with all reasonable requirements of the insurance
authority or any present or future insurer relating to the Premises.

          (d)  Cancellation of Landlord's Policies.  If any of Landlord's
               -----------------------------------                       
insurance policies are canceled or cancellation is threatened or the coverage
reduced or threatened to be reduced in any way because of any use of the
Premises or any part thereof by Tenant or any assignee or subtenant of Tenant or
by anyone Tenant permits on the Premises which is inconsistent with the
permitted use thereof, and, if Tenant fails to remedy the condition giving rise
to such cancellation, threatened cancellation, reduction of coverage, threatened
reduction of coverage, increase in premiums, or threatened increase in premiums,
within forty-eight (48) hours after notice thereof, Tenant will be deemed in
material default of this Lease and Landlord may, at its option, either terminate
this Lease or enter upon the Premises and attempt to remedy such condition, and
Tenant shall promptly pay Landlord the reasonable costs of such remedy as
additional rent.  If Landlord is unable, or elects not to  remedy such
condition, then Landlord will have all of the remedies provided for in this
Lease in the event of a default by Tenant.

          (e)  Mutual Waiver Of Subrogation.  Landlord and Tenant each hereby
               ----------------------------                                  
waive any and all rights of recovery against the other, and against the
partners, officers, employees, agents or representatives of the other, for loss
of or damage to its property or the property of others under its control, to the
extent such loss or damage is covered by any insurance policy in force (whether
or not described in this Lease) or would have been covered by any insurance
policy required to be carried under the provisions of this Lease, at the time of
such loss or damage.  Each of the parties hereto, on behalf of their respective
insurance companies insuring the property of either Landlord or Tenant against
any such loss, to the extent of the amount of any recovery under such insurance,
hereby waives any right of subrogation that it may have against the other.  Upon
obtaining the required policies of insurance, Landlord and Tenant shall give
notice to the insurance carriers of this mutual waiver of subrogation.  Such
waiver shall be expressly included in, and shall comply with the requirements
of, the respective insurance policies.

     20.  DAMAGE OR DESTRUCTION.
          --------------------- 

          (a)  Partial Destruction.  If the Premises or the Building are damaged
               -------------------                                              
by fire or other casualty to an extent not exceeding twenty-five percent (25%)
of the full replacement cost thereof, and Landlord's contractor reasonably
estimates in a writing delivered to Landlord and Tenant that the damage thereto
may be repaired, reconstructed or restored to substantially its condition
immediately prior to such damage within one hundred twenty (120) days from the
date of such casualty, and Landlord will receive insurance proceeds sufficient
                       ---                                                    
to cover the costs of such repairs, reconstruction and restoration (including
proceeds from Tenant and/or Tenant's insurance which Tenant is required to
deliver to Landlord pursuant to Subsection 20(e) to cover Tenant's obligation
for the costs of repair, reconstruction and restoration of any portion of the
Tenant Improvements and any Alterations for which Tenant is responsible under
this Lease), then Landlord agrees to commence and proceed diligently with the
work of repair, reconstruction and restoration and this Lease shall continue in
full force and effect.

          (b)  Substantial Destruction.  Any damage or destruction to the
               -----------------------                                   
Premises or the Building which Landlord is not obligated to repair pursuant to
Subsection 20(a) shall be deemed a substantial destruction.  In the event of a
substantial destruction, Landlord may elect to either

               (i)    repair, reconstruct and restore the portion of the
     Building or the Premises damaged by such casualty, in which case this Lease
     shall continue in full force and effect, subject to Tenant's termination
     right contained in Subsection 20(d); or

               (ii)   terminate this Lease effective as of the date of
     substantial destruction.

          (c)  Notice.  Under any of the conditions of Subsection 20(a) or
               ------                                                     
Subsection 20(b), Landlord agrees to give written notice to Tenant of its
intention to repair or terminate, as permitted in such Subsections, within the
earlier of thirty (30) days after the occurrence of such casualty, or fifteen

                                     -15-

 
(15) days after Landlord's receipt of the estimate from Landlord's contractor
(the applicable time period to be referred to herein as the "Notice Period").

          (d)  Tenant's Termination Rights.  If Landlord elects to repair,
               ---------------------------                                
reconstruct and restore pursuant to Subsection 20(b)(i), and if Landlord's
contractor estimates that as a result of such damage, Tenant cannot be given
reasonable use of and access to the Premises within one hundred eighty (180)
days after the date of such damage, then Tenant may terminate this Lease
effective upon delivery of written notice to Landlord within ten (10) days after
Landlord delivers notice to Tenant of its election to so repair, reconstruct or
restore.  Said termination shall be effective as of the date of substantial
destruction.

          (e)  Tenant's Costs and Insurance Proceeds.  In the event of any 
               -------------------------------------   
damage or destruction of all or any part of the Premises, Tenant agrees to
immediately (i) notify Landlord thereof, and (ii) deliver to Landlord all
property insurance proceeds received by Tenant with respect to any Tenant
Improvements and any Alterations, but excluding proceeds for Tenant's furniture,
fixtures, equipment and other personal property, whether or not this Lease is
terminated as permitted in this Section 20, and Tenant hereby assigns to
Landlord all rights to receive such insurance proceeds.  If, for any reason
(including Tenant's failure to obtain insurance for the full replacement cost of
any Tenant Improvements and any Alterations from any and all casualties), Tenant
fails to receive insurance proceeds covering the full replacement cost of any
Tenant Improvements and any Alterations which are damaged, Tenant will be deemed
to have self-insured the replacement cost of such items, and upon any damage or
destruction thereto, Tenant agrees to immediately pay to Landlord the full
replacement cost of such items, less any insurance proceeds actually received by
Landlord from Landlord's or Tenant's insurance with respect to such items.

          (f)  Abatement of Rent.  In the event of any damage, repair,
               -----------------                                      
reconstruction and/or restoration described in this Section 20, rent will be
abated or reduced, as the case may be, in proportion to the degree to which
Tenant's use of the Premises is impaired during such period of repair until such
use is restored.  Except for such abatement of rent, Tenant will not be entitled
to any compensation or damages for loss of, or interference with, Tenant's
business or use or access of all or any part of the Premises resulting from any
such damage, repair, reconstruction or restoration.

          (g)  Inability to Complete.  Notwithstanding anything to the contrary
               ---------------------                                           
contained in this Section 20, if Landlord is obligated or elects to repair,
reconstruct and/or restore the damaged portion of the Building or the Premises
pursuant to Subsection 20(a) or Subsection 20(b)(1), but is delayed from
completing such repair, reconstruction and/or restoration beyond the date which
is ninety (90) days after the date estimated by Landlord's contractor for
completion thereof by reason of any causes (other than delays caused by Tenant,
its subtenants, employees, agents or contractors) which are beyond the
reasonable control of Landlord as described in Section 33, then either Landlord
or Tenant may elect to terminate this Lease upon ten (10) days' prior written
notice given to the other after the expiration of such ninety (90) day period.

          (h)  Damage Near End of Term.  Landlord and Tenant shall each have the
               -----------------------                                          
right to terminate this Lease if any damage to the Premises or the Building
occurs during the last twelve (12) months of the Term of this Lease where
Landlord's contractor estimates in a writing delivered to Landlord and Tenant
that the repair, reconstruction or restoration of such damage cannot be
completed within sixty (60) days after the date of such casualty.  If either
party desires to terminate this Lease under this Subsection 20(h), it shall
provide written notice to the other party of such election within ten (10) days
after receipt of Landlord's contractor's repair estimates.

          (i)  Waiver of Termination Right.  Landlord and Tenant agree that the
               ---------------------------                                     
foregoing provisions of this Section 20 are to govern their respective rights
and obligations in the event of any damage or destruction and supersede and are
in lieu of the provisions of any applicable law, statute, ordinance, rule,
regulation, order or ruling now or hereafter in force which provide remedies for
damage or destruction of leased premises (including, without limitation, the
provisions of California Civil Code Section 1932, Subsection 2, and Section
1933, Subsection 4 and any successor statute or laws of a similar nature).

                                     -16-

 
          (j) Termination.  Upon any termination of this Lease under any of the
              -----------                                                      
provisions of this Section 20, the parties will be released without further
obligation to the other from the date possession of the Premises is surrendered
to Landlord except for items which have accrued and are unpaid as of the date of
termination and matters which are to survive any termination of this Lease as
provided in this Lease.

      21. EMINENT DOMAIN.
          -------------- 

          (a) Substantial Taking.  If the whole of the Premises, or such part
              ------------------                                             
thereof as shall substantially interfere with Tenant's use and occupancy of the
Premises, as contemplated by this Lease, is taken for any public or quasi-public
purpose by any lawful power or authority by exercise of the right of
appropriation, condemnation or eminent domain, or sold to prevent such taking,
either party will have the right to terminate this Lease effective as of the
date possession is required to be surrendered to such authority.

          (b) Partial Taking; Abatement of Rent.  In the event of a taking of a
              ---------------------------------                                
portion of the Premises which does not substantially interfere with Tenant's use
and occupancy of the Premises, then, neither party will have the right to
terminate this Lease and Landlord will thereafter proceed to make a functional
unit of the remaining portion of the Premises (but only to the extent Landlord
receives proceeds therefor from the condemning authority), and rent will be
abated with respect to the part of the Premises which Tenant is deprived of on
account of such taking.

          (c) Condemnation Award.  In connection with any taking of the Premises
              ------------------                                                
or the Building, Landlord will be entitled to receive the entire amount of any
award which may be made or given in such taking or condemnation, without
deduction or apportionment for any estate or interest of Tenant, it being
expressly understood and agreed by Tenant that no portion of any such award will
be allowed or paid to Tenant for any so-called bonus or excess value of this
Lease, and such bonus or excess value will be the sole property of Landlord.
Tenant agrees not to assert any claim against Landlord or the taking authority
for any compensation because of such taking (including any claim for bonus or
excess value of this Lease); provided, however, if any portion of the Premises
is taken, Tenant will have the right to recover from the condemning authority
(but not from Landlord) any compensation as may be separately awarded or
recoverable by Tenant for the taking of Tenant's furniture, fixtures, equipment
and other personal property within the Premises, for Tenant's relocation
expenses, and for any loss of goodwill or other damage to Tenant's business by
reason of such taking.

          (d) Temporary Taking.  In the event of taking of the Premises or any
              ----------------                                                
part thereof for temporary use, (i) this Lease will remain unaffected thereby
and rent will abate proportionately, and (ii) Landlord will be entitled to
receive such portion or portions of any award made for such use with respect to
the period of the taking which is within the Term.  For purpose of this
Subsection 21(d), a temporary taking shall be defined as a taking for a period
of sixty (60) days or less.

      22. DEFAULTS AND REMEDIES.
          --------------------- 

           (a) Default By Tenant.  The occurrence of any one or more of the
               -----------------                                           
following events will be deemed a default by Tenant:

               (i) The failure by Tenant to  make  any  payment  of  rent  or
     additional rent or any other payment required to be made by tenant
     hereunder, as and when due, where such failure continues for a period of
     five (5) business days after written notice thereof from Landlord to Tenant
     provided, however, that any such notice will be in lieu of, and not in
     addition to, any notice required under applicable law (including, without
     limitation, the provisions of California Code of Civil Procedure Section
     1161 regarding unlawful detainer actions or any successor statute or law of
     a similar nature).

               (ii)  The failure by Tenant to observe or perform any of the
     express or implied covenants or provisions of this Lease to be observed or
     performed by Tenant, other than as specified in Subsection 22(a)(i) or
     Subsection 22(a)(11), where such failure continues for a period of thirty
     (30) days after written notice thereof from Landlord to Tenant.  The

                                     -17-

 
     provisions of any such notice will be in lieu of, and not in addition to,
     any notice required under applicable law (including, without limitation,
     California Code of Civil Procedure Section 1161 regarding unlawful detainer
     actions and any successor statute or similar law).  If the nature of
     Tenant's default is such that more than thirty (30) days are reasonably
     required for its cure, then Tenant will not be deemed to be in default if
     Tenant commences such cure within such thirty (30) day period and
     thereafter diligently prosecutes such cure to completion; provided,
     however, if the nature of Tenant's default is such that it is not
     reasonably susceptible of cure (for example, by way of illustration and not
     limitation, material misrepresentations in Tenant's financial statements),
     no cure periods shall be provided.

               (iii)  (A) The making by Tenant or any guarantor of any general
     assignment for the benefit of creditors; (B) the filing by or against
     Tenant or any guarantor of a petition to have Tenant or such guarantor
     adjudged a bankrupt or a petition for reorganization or arrangement under
     any law relating to bankruptcy (unless, in the case of a petition filed
     against Tenant, the same is dismissed within sixty (60) days); (C) the
     appointment of a trustee or receiver to take possession of substantially
     all of Tenant's assets located at the Premises or of Tenant's interest in
     this Lease, where possession is not restored to Tenant within thirty (30)
     days; or (D) the attachment, execution or other judicial seizure of
     substantially all of Tenant's assets located at the Premises or of Tenant's
     interest in this Lease where such seizure is not discharged within thirty
     (30) days.

          (b) Notices.  Notices given under this Section 22 shall specify the
              -------                                                        
default and one or more applicable Lease provisions, and shall demand that
Tenant perform the provisions of this Lease or pay the rent that is in arrears,
as the case may be, within the applicable period of time, or quit the Premises.
No such notice shall be deemed a forfeiture or a termination of this Lease
unless Landlord so elects in the notice.

          (c) Landlord's Remedies; Termination.  In the event of any default by
              --------------------------------                                 
Tenant, in addition to any other remedies available to Landlord at law or in
equity under applicable law (including, without limitation, the remedies of
Civil Code Section 1951.4 and any successor statute or similar law), Landlord
will have the immediate right and option to terminate this Lease and all rights
of Tenant hereunder.  If Landlord elects to terminate this Lease then, to the
extent permitted under applicable law, Landlord may recover from Tenant:

               (i) the worth at the time of award of any unpaid rent which had
     been earned at the time of such termination; plus

               (ii)  the worth at the time of award of the amount by which the
     unpaid rent which would have been earned after termination until the time
     of award exceeds the amount of such rent loss that Tenant proves could have
     been reasonably avoided; plus

               (iii)  the worth at the time of award of the amount by which the
     unpaid rent for the balance of the Term after the time of award exceeds the
     amount of such rent loss that Tenant proves could be reasonably avoided;
     plus

               (iv)  any other amount necessary to compensate Landlord for all
     the detriment proximately caused by Tenant's failure to perform its
     obligations under this Lease or which, in the ordinary course of things,
     results therefrom including, but not limited to: reasonable attorneys' fees
     and costs; brokers' commissions; the costs of refurbishment alterations,
     renovation and repair of the Premises, and removal (including the repair of
     any damage caused by such removal) and storage (or disposal) of Tenant's
     personal property, equipment, fixtures, Alterations, the Tenant
     Improvements and any other items which Tenant is required under this Lease
     to remove but does not remove, as well as the unamortized value of any
     Tenant Improvement costs (less any reasonable residual value of the Tenant
     Improvements) incurred by Landlord pursuant to this Lease.  The unamortized
     value of such costs shall be determined by taking the total of such costs
     and multiplying such value by a fraction, the numerator of which is the
     number of months of the Lease Term not yet elapsed as of the date on which
     the Lease is terminated. and the denominator of which is the total number
     of months of the Lease Term.

                                     -18-

 
     As used in Subsection 22(b)(i) and Subsection 22(b)(ii), the "worth at the
time of award" is computed by allowing interest at the Interest Rate.  As used
in Subsection 22(b)(iii), the "worth at the time of award" is computed by
discounting such amount at the discount rate of the Federal Reserve Bank of San
Francisco at the time of award plus one percent (1%).

          (d) Landlord's Remedies: Re-Entry Rights.  In the event of any default
              ------------------------------------                              
by Tenant in addition to any other remedies available to Landlord under this
Lease, at law or in equity, Landlord will also have the right, with or without
terminating this Lease, to re-enter the Premises and remove all persons and
property from the Premises; such property may be removed and stored in a public
warehouse or elsewhere and/or disposed of at the cost of and for the account of
Tenant in accordance with the provisions of Subsection 13(h) of this Lease or
any other procedures permitted by applicable law.  No re-entry or taking
possession of the Premises by Landlord pursuant to this Subsection 22(d) will be
construed as an election to terminate this Lease unless a written notice of such
intention is given to Tenant or unless the termination thereof is decreed by a
court of competent jurisdiction.

          (e) Landlord's Remedies: Re-Letting.  In the event of the vacation or
              -------------------------------                                  
abandonment of the Premises by Tenant or in the event that Landlord elects to
re-enter the Premises or takes possession of the Premises pursuant to legal
proceeding or pursuant to any notice provided by law, then if Landlord does not
elect to terminate this Lease, Landlord may from time to time, without
terminating this Lease, either recover all rent as it becomes due or relet the
Premises or any part thereof on terms and conditions as Landlord in its sole
discretion may deem advisable with the right to make alterations and repairs to
the Premises in connection with such reletting.  If Landlord elects to relet the
Premises, then rents received by Landlord from such reletting will be applied:
first, to the payment of any indebtedness other than rent due hereunder from
Tenant to Landlord; second, to the payment of any reasonable cost of such
reletting; third, to the payment of the reasonable cost of any alterations and
repairs to the Premises incurred in connection with such reletting; fourth, to
the payment of rent due and unpaid hereunder and the residue, if any, will be
held by Landlord and applied to payment of future rent as the same may become
due and payable hereunder.  Should that portion of such rents received from such
reletting during any month, which is applied to the payment of rent hereunder,
be less than the rent payable during that month by Tenant hereunder, then Tenant
agrees to pay such deficiency to Landlord immediately upon demand therefor by
Landlord.  Such deficiency will be calculated and paid monthly.

          (f) Landlord's Remedies; Performance for Tenant.  Except as otherwise
              -------------------------------------------                      
expressly specified herein, all covenants and agreements to be performed by
Tenant under any of the terms of this Lease are to be performed by Tenant at
Tenant's sole cost and expense and without any abatement of rent.  If Tenant
fails to pay any sum of money owed to any party other than Landlord, for which
it is liable under this Lease, or if Tenant fails to perform any other act on
its part to be performed hereunder, Landlord may, without prior notice to
Tenant, and without waiving or releasing Tenant from its obligations, but shall
not be obligated to, make any such payment or perform any such other act to be
made or performed by Tenant Landlord's election to make any such payment or
perform any such act on Tenant's part shall not give rise to any responsibility
of Landlord to continue making the same or similar payments or performing the
same on similar acts.  Tenant agrees to reimburse Landlord upon demand for all
sums so paid by Landlord and all necessary incidental costs, together with
interest thereon at the Interest Rate from the date of such payment by Landlord
until reimbursed by Tenant.  This remedy shall be in addition to any other right
or remedy of Landlord set forth in this Section 22.

          (g) Late Payment.  If Tenant fails to pay any installment of rent or
              ------------                                                    
any other payment for which Tenant is obligated under this Lease within five (5)
business days of when due, such late amount will accrue interest at the Interest
Rate and Tenant agrees to pay Landlord as additional rent such interest on such
amount from the date such amount becomes due until such amount is paid.  In
addition, Tenant agrees to pay to Landlord concurrently with such late payment
amount, as additional rent, a late charge equal to five percent (5%) of the
amount due to compensate Landlord for the extra costs Landlord will incur as a
result of such late payment The parties agree that (i) it would be impractical
and extremely difficult to fix the actual damage Landlord will suffer in the
event of Tenant's late payment, (ii) such interest and late charge represents a
fair and reasonable estimate of the detriment that Landlord will suffer by
reason of late payment by Tenant, and (iii) the payment of interest and late
charges are distinct and separate in that the payment of interest is to

                                     -19-

 
compensate Landlord for the use of Landlord's money by Tenant, while the payment
of late charges is to compensate Landlord for Landlord's processing,
administrative and other costs incurred by Landlord as a result of Tenant's
delinquent payments.  Acceptance of any such interest and late charge will not
constitute a waiver of the Tenant's default with respect to the overdue amount,
or prevent Landlord from exercising any of the other rights and remedies
available to Landlord. Notwithstanding the foregoing, Landlord shall not ignore
a late charge or interest on a late installment of rent pursuant to the
foregoing unless Landlord has notified Tenant within the previous twelve (12)
months that an installment of rent was not paid within five (5) business days of
when due; and Landlord shall not impose a late charge or interest on any other
late payment pursuant to the foregoing unless Landlord has notified Tenant
within the previous twelve (12) months that a payment (other than a rental
installment) was not paid within five (5) business days of when due.  If Tenant
incurs a late charge more than three (3) times in any period of twelve (12)
months during the Lease Term, then, notwithstanding that Tenant cures the late
payments for which such late charges are imposed, Landlord will have the right
to require Tenant thereafter to pay all installments of Monthly Base Rent
quarterly in advance throughout the remainder of the Lease Term, and the
Security Deposit held by Landlord shall be increased and Tenant shall
immediately pay to Landlord the amount necessary to increase the Security
Deposit to no less than three (3) months Rent (whether or not any Security
Deposit was previously required hereunder).

           (h) Intentionally omitted.

           (i) Rights and Remedies Cumulative.  All rights, options and remedies
               ------------------------------                                   
of Landlord contained in this Lease will be construed and held to be cumulative,
and no one of them will be exclusive of the other, and Landlord shall have the
right to pursue any one or all of such remedies or any other remedy or relief
which may be provided by law or in equity, whether or not stated in this Lease.
Nothing in this Section 22 will be deemed to limit or otherwise affect Tenant's
indemnification of Landlord pursuant to any provision of this Lease.

      23. LANDLORD'S DEFAULT.  Landlord will not be in default in the
          ------------------                                         
performance of any obligation required to be performed by Landlord under this
Lease unless Landlord fails to perform such obligation within thirty (30) days
after the receipt of written notice from Tenant specifying in detail Landlord's
failure to perform; provided however, that if the nature of Landlord's
obligation is such that more than thirty (30) days are required for performance,
then Landlord will not be deemed in default if it commences such performance
within such thirty (30) day period and thereafter diligently pursues the same to
completion.  Upon any default by Landlord, Tenant may exercise any of its rights
provided at law or in equity, subject to the limitations on liability set forth
in Section 35 of this Lease.

      24. ASSIGNMENT AND SUBLETTING.
          ------------------------- 

          (a) Restriction on Transfer.  Except as expressly provided in this
              -----------------------                                       
Section 24, Tenant will not, either voluntarily or by operation of law, assign
or encumber this Lease or any interest herein or sublet the Premises or any part
thereof, or permit the use or occupancy of the Premises by any party other than
Tenant (any such assignment, encumbrance, sublease or the like will sometimes be
referred to as a "Transfer"), without the prior written consent of Landlord,
which consent Landlord will not unreasonably withhold.

          (b) Corporate and Partnership Transfers.  For purposes of this Section
              -----------------------------------                               
24, if Tenant is a corporation, partnership or other entity, any transfer,
assignment, encumbrance or hypothecation of fifty percent (50%) or more
(individually or in the aggregate) of any stock or other ownership interest in
such entity, and/or any transfer, assignment, hypothecation or encumbrance of
any controlling ownership or voting interest in such entity, will be deemed a
Transfer and will be subject to all of the restrictions and provisions contained
in this Section 24.  Notwithstanding the foregoing, the immediately preceding
sentence will not apply to any transfers of stock of Tenant if Tenant is a
publicly-held corporation and such stock is transferred publicly over a
recognized security exchange or over-the-counter market.

          (c) Permitted Controlled Transfers.  Notwithstanding the provisions of
              ------------------------------                                    
this Section 24 to the contrary, Tenant may assign this Lease or sublet the
Premises or any portion thereof 

                                     -20-

 
("Permitted Transfer"), without Landlord's consent and without extending any
sublease termination option to Landlord, to any parent, subsidiary or affiliate
corporation which controls, is controlled by or is under common control with
Tenant, or to any corporation resulting from a merger or consolidation with
Tenant or to any person or entity which acquires all or substantially all the
assets of Tenant's business as a going concern, provided that (i) at least
twenty (20) days prior to such assignment or sublease, Tenant delivers to
Landlord the financial statements and other financial and background information
of the assignee or sublessee described in Subsection 24(d); (ii) if an assign-
ment, the assignee assumes, in full, the obligations of Tenant under this Lease
(or if a sublease, the sublessee of a portion of the Premises or Term assumes,
in full, the obligations of Tenant with respect to such portion); (iii) the
financial net worth of the assignee or sublessee as of the time of the proposed
assignment or sublease equals or exceeds the lesser of $10,000,000 or that of
Tenant as of the date of execution of this Lease; and (iv) the use of the
Premises under Section 8 remains unchanged.

          (d) Transfer Notice.  Except for Permitted Transfers, if Tenant
              ---------------                                            
desires to effect a Transfer, then at least thirty (30) days prior to the date
when Tenant desires the Transfer to be effective (the "Transfer Date"), Tenant
agrees to give Landlord a notice (the "Transfer Notice"), stating the name,
address and business of the proposed assignee, sublessee or other transferee
(sometimes referred to hereinafter as "Transferee"), reasonable information
(including references) concerning the character, ownership, and financial
condition of the proposed Transferee, the Transfer Date, any ownership or
commercial relationship between Tenant and the proposed Transferee, and the
consideration and all other material terms and conditions of the proposed
Transfer, all in such detail as Landlord may reasonably require.  If Landlord
reasonably requests additional detail, the Transfer Notice will not be deemed to
have been received until Landlord receives such additional detail, and Landlord
may withhold consent to any Transfer until such information is provided to it.

          (e) Landlord's Options.  Within fifteen (15) days of Landlord's
              ------------------                                         
receipt of any Transfer Notice, and any additional information reasonably
requested by Landlord concerning the proposed Transferee's financial
responsibility, Landlord will elect to do one of the following:

               (i) consent to the proposed Transfer, or

               (ii)  refuse such consent which refusal shall be on reasonable
     grounds including, without limitation, those set forth in Subsection 24(f).

          (f) Reasonable Disapproval.  Landlord and Tenant hereby acknowledge
              ----------------------                                         
that Landlord's disapproval of any proposed Transfer pursuant to Subsection
24(e) will be deemed reasonably withheld if based upon any reasonable factor,
including, without limitation, any or all of the following factors: (i) the
proposed Transferee is a governmental entity; (ii) the portion of the Premises
to be sublet or assigned is irregular in shape with inadequate means of ingress
and egress; (iii) the use of the Premises by the Transferee (A) is not permitted
by the use provisions in Section 8 hereof, or (B) violates any exclusive use
granted by Landlord to another tenant in the Building; (iv) the Transfer would
likely result in a significant and inappropriate increase in the use of the
parking areas or Project Common Areas by the Transferee's employees or visitors,
and/or significantly increase the demand upon utilities and services to be
provided by Landlord to the Premises or (v) the Transferee does not have the
financial capability to fulfill the obligations imposed by the Transfer and this
Lease.  In the event Landlord withholds or conditions its consent and Tenant or
any proposed Transferee claims that Landlord has unreasonably withheld or
delayed its consent under Subsection 24(f) or otherwise has breached or acted
unreasonably under this Section 24, their sole remedies shall be a declaratory
judgment and an injunction for the relief sought without any monetary damages,
and Tenant hereby waives all other remedies on its own behalf and, to the extent
permitted under all applicable laws, on behalf of the proposed Transferee.  In
any such action, each party shall bear its own attorneys' fees.

          (g) Additional Conditions.  A condition to Landlord's consent to any
              ---------------------                                           
Transfer of this Lease will be the delivery to Landlord of a true copy of the
fully executed instrument of assignment, sublease, transfer or hypothecation
(provided, however, that Tenant may submit for Landlord's conditional consent
the unexecuted but substantially final form of the transfer document in
question), and, in the case of an assignment the delivery to Landlord of an
agreement executed by the Transferee 

                                     -21-

 
in form and substance reasonably satisfactory to Landlord, whereby the
Transferee assumes and agrees to be bound by all of the terms and provisions of
this Lease and to perform all of the obligations of Tenant hereunder. As a
condition for granting its consent to any assignment or sublease, Landlord may
require that the assignee or sublessee remit directly to Landlord on a monthly
basis, all monies due to Tenant by said assignee or sublessee, except any excess
rent to which Tenant may be entitled under Subsection 24(h). As a condition to
Landlord's consent to any sublease, such sublease must provide that it is
subject and subordinate to this Lease and to all mortgages; that Landlord may
enforce the provisions of the sublease, including collection of rent; that in
the event of termination of this Lease for any reason, including without
limitation a voluntary surrender by Tenant, or in the event of any reentry or
repossession of the Premises by Landlord, Landlord may, at its option, either
(i) terminate the sublease, or (ii) take over all of the right, title and
interest of Tenant, as sublessor, under such sublease, in which case such
sublessee will attorn to Landlord, but that nevertheless Landlord will not (1)
be liable for any previous act or omission of Tenant under such sublease, (2) be
subject to any defense or offset previously accrued in favor of the sublessee
against Tenant, or (3) be bound by any previous modification of any sublease
made without Landlord's written consent, or by any previous prepayment by
sublessee of more than one month's rent.

          (h) Excess Rent.  If Landlord consents to any Transfer, Tenant agrees
              -----------                                                      
to pay to Landlord, as additional rent fifty (50%) of all the "Profits" payable
by the sublessee or assignee pursuant to any approved sublease or assignment.
As used herein, "Profits" shall mean the gross revenue and all other
consideration payable for, or by reason of the assignment or sublease,
including, but not limited to, any sums paid for personal property, goodwill,
Tenant's business or services in excess of the fair market value thereof, sums
paid for tenant improvements or fixtures, and any rental amounts paid, less: (a)
the rental amounts paid to Landlord by Tenant during the period of the sublease
term or during the assignment allocable to the portion of the Premises in
question; (b) any reasonable improvement allowance or other reasonable economic
concession actually paid by Tenant to sublessee or assignee, (c) customary
brokers' commissions actually paid by Tenant; (d) reasonable attorneys' fees
paid by Tenant to prepare and/or review the transfer documents in connection
with the assignment or sublease; and (e) reasonable costs actually incurred by
Tenant to advertise the space for such sublease or assignment Tenant and
Landlord acknowledge and agree that it shall not be unreasonable for Landlord
to require, as a condition for its consent to a proposed assignment or
subletting, a written agreement between Tenant, Landlord and the proposed
assignee or sublessee stating that 50% of the Profits shall be the property of
Landlord and agreeing that such amounts shall, at Landlord's option, be payable
to Landlord by Tenant or directly to Landlord by the assignee or sublessee.

           (i)  Intentionally omitted.

           (j) No  Release.  No  Transfer   will   release   Tenant   of
               -----------                                                
Tenant's obligations under this Lease or alter the primary liability of Tenant
to pay the rent and to perform all other obligations to be performed by Tenant
hereunder. However, the acceptance of rent by Landlord from any other person
will not be deemed to be a waiver by Landlord of any provision hereof. Consent
by Landlord to one Transfer will not be deemed consent to any subsequent
Transfer. In the event of default by any Transferee of Tenant or any successor
of Tenant in the performance of any of the terms hereof, Landlord may proceed
directly against Tenant without the necessity of exhausting remedies against
such Transferee or successor. Landlord may consent to subsequent assignments of
this Lease or sublettings or amendments or modifications to this Lease with
assignees of Tenant, without notifying Tenant, or any successor of Tenant and
without obtaining its or their consent thereto and any such actions will not
relieve Tenant of liability under this Lease. The dissolution of the original
Tenant hereunder following a Permitted Transfer that is a merger, consolidation
or asset purchase in compliance with Section 24(a) shall not require Landlord's
consent provided the successor Tenant fully assumes all of the original Tenant's
obligations under this Lease from and after the date of this Lease.

          (k) Administrative and Attorneys' Fees.  If Tenant effects a Transfer
              ----------------------------------                               
or requests the consent of Landlord to any Transfer (whether or not such
Transfer is consummated), then, upon demand, Tenant agrees to pay Landlord a
non-refundable administrative fee of Two Hundred Fifty Dollars ($250.00), plus
any reasonable attorneys' and paralegal fees incurred by Landlord, not to exceed
$1,000, in connection with such Transfer or request for consent (whether
attributable to 

                                     -22-

 
Landlord's in-house attorneys or paralegals or otherwise). Acceptance of the Two
Hundred Fifty Dollar ($250.00) administrative fee and/or reimbursement of
Landlord's attorneys' and paralegal fees will in no event obligate Landlord to
consent to any proposed Transfer.

      25. SUBORDINATION.  At the election of Landlord or any mortgagee or
          -------------                                                  
beneficiary with a deed of trust encumbering the Building or the Project or any
portion thereof, or any lessor of a ground or underlying lease with respect to
the Building or the Project or any portion thereof, this Lease will be subject
and subordinate at all times to: (i) all ground leases or underlying leases
which may now exist or hereafter be executed affecting the Building; and (ii)
the lien of any mortgage or deed of trust or any other hypothecation for
security now or hereafter placed upon the Project, the Building or any portion
thereof, or Landlord's interest and estate in any of same, and to any and all
advances made on the security thereof and to all renewals, modifications,
consolidations, replacements and extensions thereof which may now exist or
hereafter be executed.  Notwithstanding the foregoing, if any mortgagee, trustee
or ground lessor shall elect to have this Lease prior to the lien of its
mortgage or deed of trust or to ground lease, and shall give written notice
thereof to Tenant at any time prior to the transfer of the Premises in
foreclosure or by deed in lieu of foreclosure of such lien or otherwise (or at
any time prior to the termination of the ground lease, as the case may be),
then, notwithstanding any prior subordination, this Lease shall be deemed prior
to such mortgage, deed of trust, or ground lease, whether this Lease is dated
prior or subsequent to the date of said mortgage, deed of trust or ground lease
or the date of recording thereof.  Notwithstanding the foregoing provisions of
this Section 25, the transferee of the Premises upon any foreclosure sale or
pursuant to any deed in lieu of foreclosure or other transfer (or the ground
lessor in the event of a termination of a ground lease) shall have the right,
whether or not this Lease has been terminated by or in connection with such
transfer or termination of ground lease (whether voluntarily, involuntarily or
by operation of law), and provided that such transferee shall not disturb
Tenant's rights under this Lease so long as Tenant is not in default to require
Tenant to attorn to such transferee and/or to enter into a new lease of the
Premises (with the transferee or ground lessor as landlord) on terms and
conditions identical to those as set forth in the Lease, except that the term of
the new lease shall expire on the date specified herein for the expiration of
the term of this Lease.  The provisions hereof are intended to be self-executing
and do not require the necessity of any additional document being executed by
Tenant for the purpose of effecting same.  Tenant nevertheless agrees to execute
and deliver to Landlord, within ten (10) business days after receipt of
Landlord's request therefor, any documents reasonably requested by Landlord to
effectuate or evidence any subordination or adornment, to make this Lease prior
to the lien of any mortgage, deed of trust or ground lease or to enter into a
new lease, each as described above in this Section 25, provided, however, that
if Tenant fails to execute and deliver to Landlord any such subordination or
attornment documents within such period, Landlord shall make a second request of
Tenant to provide such documents, and Tenant shall then have ten (10) additional
business days from the date of Tenant's receipt of Landlord's request for such
documents to execute and deliver them to Landlord, and failing to do so:  (i)
Tenant shall be in default hereunder with no right to further notice or cure,
and (ii) Tenant hereby irrevocably appoints Landlord as Tenant's attorney-in-
fact to execute and deliver such documents for Tenant, such power, being coupled
with an interest and being irrevocable.  Without limitation on any of the
foregoing, Tenant hereby waives its rights under any law which gives or purports
to give Tenant any right to terminate or otherwise adversely affect this Lease
and the obligations of Tenant hereunder in the event of any such foreclosure
proceeding, sale or termination of ground lease.

      26. ESTOPPEL CERTIFICATE.
          -------------------- 

          (a) Tenant's Obligations.  Within ten (10) business days following
              --------------------                                          
receipt of any written request which Landlord may make from time to time, Tenant
agrees to execute and deliver to Landlord a statement in a form substantially
similar to the form of Exhibit "G" attached hereto or as may reasonably be
                       -----------                                        
required by Landlord's lender, certifying:  (i) the Commencement Date of this
Lease; (ii) the fact that this Lease is unmodified and in full force and effect
(or, if there have been modifications, that this Lease is in full force and
effect, and stating the date and nature of such modifications); (iii) the date
to which the rent and other sums payable under this Lease have been paid; (iv)
that there are no current defaults under this Lease by either Landlord or Tenant
except as specified in Tenant's statement; and (v) such other matters reasonably
requested by Landlord. Landlord and Tenant intend that any statement delivered
pursuant to this Section 26 may be relied 

                                     -23-

 
upon by any mortgagee, beneficiary, purchaser or prospective purchaser of the
Building or any interest therein.

          (b) Tenant's Failure to Deliver.  Tenant's failure to deliver such
              ---------------------------                                   
statement within such time will be conclusive upon Tenant (i) that this Lease is
in full force and effect, without modification except as may be represented by
Landlord, (ii) that there are no uncured defaults in Landlord's performance, and
(iii) that not more than one (1) month's rent has been paid in advance.
Without limiting the foregoing, if Tenant fails to deliver any such statement
within such ten (10) business day period, Landlord may deliver to Tenant an
additional request for such statement and Tenant's failure to deliver such
statement to Landlord within ten (10) business days after delivery of such
additional request will constitute a default under this Lease.

      27. Intentionally omitted.

      28. RULES AND REGULATIONS.  Tenant agrees to faithfully observe and comply
          ---------------------                                                 
with the "Rules and Regulations," a copy of which is attached hereto and marked
Exhibit "H" and all reasonable and nondiscriminatory modifications thereof and
- -----------                                                                   
additions thereto from time to time put into effect by Landlord.  Landlord will,
upon request by Tenant notify other tenants of the Building of clear violations
by such tenants of the Rules and Regulations that adversely affect Tenant's use
of the Premises, but Landlord will in no event be responsible to Tenant for the
violation or non-performance by any other tenant or occupant of the Building of
any of the Rules and Regulations.

      29. MODIFICATION AND  CURE RIGHTS OF LANDLORD'S MORTGAGEES AND LESSORS.
          ------------------------------------------------------------------ 

          (a) Modifications.  If, in connection with Landlord's obtaining or
              -------------                                                 
entering into any financing or ground lease for any portion of the Building or
the Project, the lender or ground lessor requests modifications to this Lease,
Tenant, within ten (10) days after request therefor, agrees to execute an
amendment to this Lease incorporating such modifications, provided such
modifications are reasonable and do not increase the obligations of Tenant under
this Lease or adversely affect the leasehold estate created by this Lease.

          (b) Cure Rights.  In the event of any default on the part of Landlord,
              -----------                                                       
Tenant will give notice by registered or certified mail to any beneficiary of a
deed of trust or mortgage covering the Premises or ground lessor of Landlord
whose address has been furnished to Tenant, and Tenant agrees to offer such
beneficiary, mortgagee or ground lessor a reasonable opportunity to cure the
default (including with respect to any such beneficiary or mortgagee, time to
obtain possession of the Premises, subject to this Lease and Tenant's rights
hereunder, by power of sale or a judicial foreclosure, if such should prove
necessary to effect a cure).

      30. DEFINITION OF LANDLORD.  The term "Landlord," as used in this Lease,
          ----------------------                                              
so far as covenants or obligations on the part of Landlord are concerned, means
and includes only the owner or owners, at the time in question, of the fee title
of the Premises or the lessee(s) under any ground lease, if any.  In the event
of any transfer, assignment or other conveyance or transfers of any such title
(other than a transfer for security purposes only, but including any transfer to
a purchaser at a foreclosure sale or by deed in lieu of foreclosure, subject to
the provisions of Section 25), Landlord herein named (and in case of any
subsequent transfers or conveyances, the then grantor) shall be and is
automatically relieved from and after the date of such transfer, assignment or
conveyance of all liability as respects the performance of any covenants or
obligations on the part of Landlord contained in this Lease thereafter to be
performed, and the transferee shall be deemed, without any further agreement
between the parties or their successors in interest or between the parties and
any such transferee, to have assumed and agreed to carry out any and all the
covenants and obligations of the Landlord arising under this Lease after the
date of such transfer.  Subject to the provisions of Section 25 hereof, Tenant
agrees to attorn to and recognize such transferee and shall be deemed to have
attorned to and recognized such transferee without any further agreement between
the parties or their successors in interest or between the parties and any such
transferee.  Landlord and Landlord's transferees and assignees have the absolute
right to transfer all or any portion of their respective title and interest in
the Project, the Building, the Premises and/or this Lease without the consent of
Tenant and such transfer or subsequent transfer will not be deemed a violation
on Landlord's part of any of 

                                     -24-

 
the terms and conditions of this Lease. If any Security Deposit has been made by
Tenant, Landlord may transfer such Security Deposit to the transferee, and upon
the assumption of such transferee of Landlord's obligations under this Lease,
Landlord shall be discharged from any further liability in reference thereto.

      31. WAIVER.  The waiver by either party of any breach of any term,
          ------                                                        
covenant or condition herein contained will not be deemed to be a waiver of any
subsequent breach of the same or any other term, covenant or condition herein
contained, nor will any custom or practice which may develop between the parties
in the administration of the terms hereof be deemed a waiver of or in any way
affect the right of either party to insist upon performance in strict accordance
with said terms. The subsequent acceptance of rent or any other payment
hereunder by Landlord will not be deemed to be a waiver of any preceding breach
by Tenant of any term, covenant or condition of this Lease, other than the
failure of Tenant to pay the particular rent so accepted, regardless of
Landlord's knowledge of such preceding breach at the time of acceptance of such
rent.  No acceptance by Landlord of a lesser sum than the basic rent and
additional rent or other sum then due will be deemed to be other than on account
of the earliest installment of such rent or other amount due, nor will any
endorsement or statement on any check or any letter accompanying any check be
deemed an accord and satisfaction, and Landlord may accept such check or payment
without prejudice to Landlord's right to recover the balance of such installment
or other amount or pursue any other remedy provided in this Lease.  The consent
or approval of Landlord to or of any act by Tenant requiring Landlord's consent
or approval will not be deemed to waive or render unnecessary Landlord's consent
or approval to or of any subsequent similar acts by Tenant.

      32. PARKING.
          ------- 

          (a) Grant of Parking Rights.  So long as this Lease is in effect and
              -----------------------                                         
provided Tenant is not in default hereunder, Landlord grants to Tenant and
Tenant's Authorized Users (as defined below) a license to use the number and
type of parking spaces designated in Subsection 1(s) subject to the terms and
conditions of this Section 32 and the Rules and Regulations regarding parking
contained in Exhibit "H" attached hereto.  As consideration for the use of such
             -----------                                                       
parking spaces, Tenant agrees to pay to Landlord or, at Landlord's election,
directly to Landlord's parking operator, as additional rent under this Lease,
the parking rate set forth in Subsection 1(t) or, if no rate is specified in
Subsection 1(t) or the rate therein ceases to be applicable, then at the
prevailing parking rate for each such parking space as established by Landlord
in its discretion from time to time, provided, however, that Tenant's employee
parking consisting of up to four (4) spaces per every 1,000 usable square feet
of space leased by Tenant, shall be free of charge for the initial Term of the
Lease.  Tenant agrees that all parking charges will be payable on a monthly
basis concurrently with each monthly payment of Monthly Base Rent.  Tenant
agrees to submit to Landlord or, at Landlord's election, directly to Landlord's
parking operator with a copy to Landlord, written notice in a form reasonably
specified by Landlord containing the names, home and office addresses and
telephone numbers of those persons who are authorized by Tenant to use Tenant's
parking spaces on a monthly basis ("Tenant's Authorized Users") and shall use
its best efforts to identify each vehicle of Tenant's Authorized Users by make,
model and license number.  Tenant agrees to deliver such notice prior to the
beginning of the Term of this Lease and to periodically update such notice upon
specific request by Landlord or Landlord's parking operator to reflect changes
to Tenant's Authorized Users or their vehicles.

          (b) Visitor Parking. So long as  this  Lease  is  in  effect,
              ---------------                                           
Tenant's  visitors  and guests will be entitled to use those specific parking
areas which are designated for short term visitor parking and which are located
within the surface parking area(s), if any, and/or within the parking
structure(s) which serve the Building.  Visitor parking will be made available
at a charge to Tenant's visitors and guests, with the rate being established by
Landlord in its discretion from time to time at such rates being charged to
other tenants in the Building without special arrangements as to parking rates.
Tenant, at its sole cost and expense, may elect to validate such parking for its
visitors and guests.  All such visitor parking will be on a non-exclusive, in
common basis with all other visitors and guests of the Project.

          (c) Use of Parking Spaces.  Tenant will not use or allow any of
              ---------------------                                      
Tenant's Authorized Users to use any parking spaces which have been specifically
assigned by Landlord to 

                                     -25-

 
other tenants or occupants or for other uses such as visitor parking or which
have been designated by any governmental entity as being restricted to certain
uses. Tenant will not be entitled to increase or reduce its parking privileges
applicable to the Premises during the Term of the Lease except as follows: If at
any time Tenant desires to increase or reduce the number of parking spaces
allocated to it under the terms of this Lease, Tenant must notify Landlord in
writing of such desire and Landlord will have the right in its good faith but
sole discretion, to either (a) approve such requested increase in the number of
parking spaces allocated to Tenant (with an appropriate increase to the
additional rent payable by Tenant for such additional spaces based on the then
prevailing parking rates), (b) approve such requested decrease in the number of
parking spaces allocated to Tenant (with an appropriate reduction in the
additional rent payable by Tenant for such eliminated parking spaces based on
the then prevailing parking rates), or (c) disapprove such requested increase or
decrease in the number of parking spaces allocated to Tenant. Promptly following
receipt of Tenant's written request, Landlord will provide Tenant with written
notice of its decision including a statement of any adjustments to the
additional rent payable by Tenant for parking under the Lease, if applicable. No
parking stalls will be allocated to Tenant with respect to any space leased by
Tenant under the Lease which consists of less than the full incremental amounts
of rentable square footage, if any, required for parking stalls, calculated on a
1 stall for each 250 usable square feet basis.

          (d) General Provisions.  Except as otherwise provided in this
              ------------------                                       
Paragraph 32 and in the Addendum, Landlord reserves the right to set and
increase monthly fees and/or daily and hourly rates for parking privileges from
time to time during the Term of the Lease.  Landlord may assign any unreserved
and unassigned parking spaces and/or make all or any portion of such spaces
reserved, if Landlord reasonably determines that it is necessary for orderly and
efficient parking or for any other reasonable reason.  Failure to pay the rent
for any particular parking spaces or failure to comply with any terms and
conditions of this Lease applicable to parking may be treated by Landlord as a
default under this Lease and, in addition to all other remedies available to
Landlord under the Lease, at law or in equity, Landlord may elect to recapture
such parking spaces for the balance of the Term of this Lease if Tenant does not
cure such failure within the applicable cure period set forth in Section 22 of
this Lease.  In such event, Tenant and Tenant's Authorized Users will be deemed
visitors for purposes of parking space use and will be entitled to use only
those parking areas specifically designated for visitor parking subject to all
provisions of this Lease applicable to such visitor parking use. Tenant's
parking rights and privileges described herein are personal to Tenant and may
not be assigned or transferred, or otherwise conveyed, without Landlord's prior
written consent, which consent Landlord may withhold in its sole and absolute
discretion.  In any event under no circumstances may Tenant's parking rights
and privileges be transferred, assigned or otherwise conveyed separate and apart
from Tenant's interest in this Lease.

          (e) Cooperation with Traffic Mitigation Measures.  Landlord and Tenant
              --------------------------------------------                      
agree to use their reasonable, good faith efforts to cooperate in traffic
mitigation programs which may be undertaken by Landlord independently, or in
cooperation with local municipalities or governmental agencies or other property
owners in the vicinity of the Building.  Such programs may include, but will not
be limited to, carpools, vanpools and other ridesharing programs, public and
private transit. flexible work hours, preferential assigned parking programs and
programs to coordinate tenants within the Project with existing or proposed
traffic mitigation programs.

          (f) Parking Rules and Regulations.  Tenant and Tenant's Authorized
              -----------------------------                                 
Users shall comply with all rules and regulations regarding parking set forth in
Exhibit "H" attached hereto and Tenant agrees to cause its employees,
- -----------                                                          
subtenants, assignees, contractors, suppliers, customers and invitees to comply
with such rules and regulations.  Landlord reserves the right from time to time
to modify and/or adopt such other reasonable and non-discriminatory rules and
regulations for the parking facilities as it deems reasonably necessary for the
operation of the parking facilities.

      33. FORCE MAJEURE.  If either Landlord or Tenant is delayed, hindered in
          -------------                                                       
or prevented from the performance of any act required under this Lease by reason
of strikes, lock-outs, labor troubles, inability to procure standard materials,
failure of power, restrictive governmental laws, regulations or orders or
governmental action or inaction (including failure, refusal or delay in issuing
permits, approvals and/or authorizations which is not the result of the action
or inaction of the party claiming such delay), riots, insurrection, war, fire,
earthquake, flood or other natural disaster, unusual and unforeseeable delay
which results from an interruption of any public utilities (e.g., electricity,
gas, 

                                     -26-

 
water, telephone) or other unusual and unforeseeable delay not within the
reasonable control of the party delayed in performing work or doing acts
required under the provisions of this Lease, then performance of such act will
be excused for the period of the delay and the period for the performance of
any such act will be extended for a period equivalent to the period of such
delay.  The provisions of this Section 33 will not operate to excuse Tenant from
prompt payment of rent or any other payments required under the provisions of
this Lease.

      34. SIGNS.  Subject to the, provisions of Paragraph 4 of the Addendum,
          -----                                                             
Landlord will designate the location on the Premises, if any, for one or more
Tenant identification sign(s).  Tenant agrees to have Landlord install and
maintain Tenant's identification sign(s) in such designated location in
accordance with this Section 34 at Tenant's sole cost and expense.  Tenant has
no right to install Tenant identification signs in any other location in, on or
about the Premises or the Project and will not display or erect any other signs,
displays or other advertising materials that are visible from the exterior of
the Building or from within the Building in any interior or exterior common
areas.  The size, design, color and other physical aspects of any and all
permitted sign(s) will be subject to (i) Landlord's written approval prior to
installation, which approval may be withheld in Landlord's discretion, (ii) any
covenants, conditions or restrictions governing the Premises, and (iii) any
applicable municipal or governmental permits and approvals.  Tenant will be
responsible for all costs for installation, maintenance, repair and removal of
any Tenant identification sign(s).  If Tenant fails to remove Tenant's sign(s)
upon termination of this Lease and repair any damage caused by such removal,
Landlord may do so at Tenant's expense.  Tenant agrees to reimburse Landlord for
all costs incurred by Landlord to effect any installation, maintenance or
removal on Tenant's account, which amount will be deemed additional rent, and
may include, without limitation, all sums disbursed, incurred or deposited by
Landlord including Landlord's costs, expenses and actual attorneys' fees with
interest thereon at the Interest Rate from the date of Landlord's demand until
paid by Tenant. Any sign rights granted to Tenant under this Lease are personal
to Tenant and may not be assigned, transferred or otherwise conveyed to any
assignee or subtenant of Tenant without Landlord's prior written consent, which
consent Landlord may withhold in its sole and absolute discretion.  In the event
of any conflict between the provisions of this Section 34 and those of Paragraph
4 of the Addendum, the provisions of Paragraph 4 of the Addendum shall control.

      35. LIMITATION ON LIABILITY.  In consideration of the benefits accruing
          -----------------------                                            
hereunder, Tenant on behalf of itself and all successors and assigns of Tenant
covenants and agrees that, in the event of any actual or alleged failure, breach
or default hereunder by Landlord:

          (a) Tenant's recourse against Landlord for monetary damages will be
limited to Landlord's interest in the Building including, subject to the prior
rights of any Mortgagee, Landlord's interest in the rents of the Building, and
any insurance proceeds payable to Landlord;

          (b) Except as may be necessary to secure jurisdiction of the
partnership, no partner of Landlord shall be sued or named as a party in any
suit or action and no service of process shall be made against any partner of
Landlord;

          (c) No partner of Landlord shall be required to answer or otherwise
plead to any service of process;

          (d) No judgment will be taken against any partner of Landlord and any
judgment taken against any partner of Landlord may be vacated and set aside at
any time after the fact;

          (e) No writ of execution will be levied against the assets of any
partner of Landlord;

          (f) The obligations under this Lease do not constitute personal
obligations of the individual partners, directors, officers or shareholders of
Landlord, and Tenant shall not seek recourse against the individual partners,
directors, officers or shareholders of Landlord or any of their personal assets
for satisfaction of any liability in respect to this Lease;

          (g) These covenants and agreements are enforceable both by Landlord
and also by any partner of Landlord.

                                     -27-

 
      36. FINANCIAL STATEMENTS.  Prior to the execution of this Lease by
          --------------------                                          
Landlord and at any time during the Term of this Lease upon ten (10) business
days prior written notice from Landlord, Tenant agrees to provide Landlord with
a current financial statement for Tenant and any guarantors of Tenant and
financial statements for the two (2) years prior to the current financial
statement year for Tenant and any guarantors of Tenant.  Such statements are to
be prepared in accordance with generally accepted accounting principles and, if
such is the normal practice of Tenant, audited by an independent certified
public accountant.

      37. QUIET ENJOYMENT.  Landlord covenants and agrees with Tenant that upon
          ---------------                                                      
Tenant paying the rent required under this Lease and paying all other charges
and performing all of the covenants and provisions on Tenant's part to be
observed and performed under this Lease, Tenant may peaceably and quietly have,
hold and enjoy the Premises in accordance with this Lease.

      38. MISCELLANEOUS.
          ------------- 

          (a) Conflict of Laws.  This Lease shall be governed by and construed
              ----------------                                                
pursuant to the laws of the State.

          (b) Successors and Assigns.  Except as otherwise provided in this
              ----------------------                                       
Lease, all of the covenants, conditions and provisions of this Lease shall be
binding upon and shall inure to the benefit of the parties hereto and their
respective heirs, personal representatives, successors and assigns.

          (c) Professional Fees and Costs. Subject to the provisions of Article
              ---------------------------                                      
39, if either Landlord or Tenant should bring suit against the other with
respect to this Lease, then all reasonable costs and expenses, including without
limitation, actual professional fees and costs such as appraisers', accountants'
and reasonable attorneys' fees and costs, incurred by the prevailing party
therein shall be paid by the other party, which obligation on the part of the
other party shall be deemed to have accrued on the date of the commencement of
such action.

          (d) Terms and Headings.  The words "Landlord" and "Tenant" used herein
              ------------------                                                
shall include the plural as well as the singular.  Words used in any gender
include other genders.  The Section and subsection headings of this Lease are
not a part of this Lease and shall have no effect upon the construction or
interpretation of any part hereof.

          (e) Time. Time is of the essence with respect to the performance of
              ----                                                           
every provision of this Lease in which time of performance is a factor.

          (f) Prior Agreement; Amendments.  This Lease constitutes and is
              ---------------------------                                
intended by the parties to be a final, complete and exclusive statement of their
entire agreement with respect to the subject matter of this Lease.  This Lease
supersedes any and all prior and contemporaneous agreements and understandings
of any kind relating to the subject matter of this Lease.  There are no other
- -----------                                                                  
agreements, understandings, representations, warranties, or statements, either
oral or in written form, concerning the subject matter of this Lease.  No
alteration, modification, amendment or interpretation of this Lease shall be
binding on the parties unless contained in a writing which is signed by both
parties.

          (g) Separability.  Any provision of this Lease which shall prove to be
              ------------                                                      
invalid, void or illegal in no way affects, impairs or invalidates any other
provision hereof, and such other provisions shall remain in full force and
effect.

          (h) Recording.  Neither Landlord nor Tenant shall record this Lease
              ---------                                                      
nor a short form memorandum thereof without the consent of the other.

          (i) Counterparts.  This Lease may be executed in one or more
              ------------                                            
counterparts, each of which shall constitute an original and all of which shall
be one and the same agreement.

          (j) Nondisclosure of Lease Terms.  Tenant acknowledges and agrees that
              ----------------------------                                      
the terms of this Lease are confidential and constitute proprietary information
of Landlord.  Disclosure of the terms could adversely affect the ability of
Landlord to negotiate other leases and impair 

                                     -28-

 
Landlord's relationship with other tenants. Accordingly, Tenant agrees that ft,
and its partners, officers, directors, employees and attorneys, shall not
intentionally and voluntarily disclose the terms and conditions of this Lease to
any newspaper or other publication or any other tenant or apparent prospective
tenant of the Building or other portion of the Project, or real estate agent
other than CB Madison or another agent exclusively serving Tenant, either
directly or indirectly, without the prior written consent of Landlord, provided,
however, that Tenant may disclose the terms to prospective subtenants or
assignees under this Lease.
 
          (k) Use of Project or Building Name.  Tenant may use the Project or
              -------------------------------                                
Building name in Tenant's advertising in connection with Tenant's business at
the Premises and for no other purpose, except with Landlord's prior written
consent Tenant shall not have or acquire any property right or interest in the
Project name or Building name.  Landlord reserves the right to change the name
or title of the Project.  Building or Premises at any time, and Tenant waives
all claims for damages arising from or in connection with any such change;
provided, however, that Landlord shall notify Tenant of the name change as soon
as reasonably practicable following its implementation.

          (l) No Light and Air Easement.  Any diminution or shutting off of
              -------------------------                                    
light or air by any structure which may be erected at the Project or on lands
adjacent to the Building shall in no way affect this Lease, abate rent or
otherwise impose any liability on Landlord.  Neither does this Lease confer any
right with regard to the subsurface of the land on which the Project or Building
is situated.

      39. RESOLUTION OF DISPUTES.  Landlord and Tenant have agreed on the
          ----------------------                                         
following mechanisms in order to obtain prompt and expeditious resolution of all
controversies, claims or disputes arising out of or in connection with the
performance or non-performance of any terms of the Lease and on the equitable
and fair allocation as to Landlord's and Tenant's obligations hereunder,
provided, however, that nothing contained herein shall prevent Landlord from
seeking and/or obtaining summary relief under applicable unlawful detainer
statutes.

          (a) Reference of Dispute.  Any dispute seeking damages, interpretation
              --------------------                                              
of this Lease and any dispute seeking equitable relief, such as but not limited
to specific enforcement of any provision hereof, shall be heard and determined
by a referee pursuant to California Code of Civil Procedure Section 638,
subdivision 1. The venue of any proceeding hereunder shall be in the County,
unless changed by order of the referee.

               (i) Procedure for Appointment.  The party seeking to resolve the
                   -------------------------                                   
     dispute shall file in court and serve on the other party a complaint
     describing the matters in dispute. Service of the complaint shall be as
     prescribed by California law.  At any time after service of the complaint,
     any party may request the designation of a referee to try the dispute.
     Thereafter the Landlord and Tenant shall use their best efforts to agree
     upon the selection of a referee from among the available referees at
     Judicial Arbitration and Mediation Service ("JAMS").  If Landlord and
     Tenant are unable to agree upon a referee within ten days after a written
     request to do so by any party, then either may petition the judge of the
     Superior Court to whom the case is then assigned to appoint a referee from
     JAMS.  For the guidance of the judge making the appointment of said
     referee, Landlord and Tenant agree that the person so appointed shall be a
     retired judge from JAMS experienced in the subject matter of the dispute.

               (ii)  Standards for Decision.  To the extent consistent with the
                     ----------------------                                    
     terms of this Agreement, the provisions of California Code of Civil
     Procedure, Sections 642, 643, 644 and 645 shall be applicable to dispute
     resolution by a referee hereunder.  In an effort to clarify and amplify the
     provisions of California Code of Civil Procedure, Sections 644 and 645,
     Landlord and Tenant agree that the referee shall decide issues of fact and
     law submitted by Landlord and Tenant for decision in the same manner as
     required for a trial by court as set forth in California Code of Civil
     Procedure, Sections 631.8 and 632, and California Rules of Court Rule 232.
     The referee shall try and decide the dispute according to all of the
     substantive and procedural law of the State of California, unless Landlord
     and Tenant stipulate to the contrary.  When the referee has decided the
     dispute, the referee shall also cause the preparation of a judgment based
     on said decision.  The judgment to be entered by the Superior Court will be
     based upon the decision of the referee.  Landlord and Tenant agree that the

                                     -29-

 
     referee's decision shall be appealable in the same manner as if the judge
     signing the judgment had tried the case.

          (b) Cooperation.  Landlord and Tenant shall diligently cooperate with
              -----------                                                      
one another and the person appointed to resolve the dispute, and shall perform
such acts as may be necessary to obtain a prompt and expeditious resolution of
the dispute.  If either party refuses to diligently cooperate, the other party,
after first giving notice of its intent to rely on the provisions of this
Section 39, incurs additional expenses or attorneys' fees solely as a result of
such failure to diligently cooperate, the referee may award such additional
expenses and attorneys' fees to the party giving such notice, even if such party
is not the prevailing party in the dispute.

          (c) Allocation of Costs.  The cost of the proceeding shall initially
              -------------------                                             
be borne equally by Landlord and Tenant, but, subject to Subsection 39(b), the
Prevailing Party in such proceeding shall be entitled to recover, in addition to
reasonable attorneys' fees and all other costs, its contribution for the
reasonable cost of the referee as an item of recoverable costs.  The referee
shall include such costs in his judgment or award.

      40. EXECUTION OF LEASE.
          ------------------ 

           (a) Joint and Several Obligations.  Intentionally omitted.
               -----------------------------                         

           (b) Tenant as Corporation or Partnership.  If Tenant executes this
               ------------------------------------                          
Lease as a corporation or partnership, then Tenant and the persons executing
this Lease on behalf of Tenant represent and warrant that such entity is duly
qualified and in good standing to do business in California and that the
individuals executing this Lease on Tenant's behalf are duly authorized to
execute and deliver this Lease on its behalf, and in the case of a corporation,
in accordance with a duly adopted resolution of the board of directors of Tenant
a copy of which is to be delivered to Landlord on execution hereof, if requested
by Landlord, and in accordance with the by-laws of Tenant, and, in the case of a
partnership, in accordance with the partnership agreement and the most current
amendments thereto, if any, copies of which are to be delivered to Landlord on
execution hereof, if requested by Landlord, and that this Lease is binding upon
Tenant in accordance with its terms.

          (c) Examination of Lease.  Submission of this instrument by Landlord
              --------------------                                            
to Tenant for examination or signature by Tenant does not constitute a
reservation of or option for lease, and it is not effective as a lease or
otherwise until execution by and delivery to both Landlord and Tenant.

     IN WITNESS WHEREOF, the parties have caused this Lease to be duly executed
by their duly authorized representatives as of the date first above written.


                                    LANDLORD:
                                    MCDONNELL DOUGLAS REALTY 
                                    COMPANY, a California corporation


                                    By:
                                       ---------------------------------

                                         Name:
                                              --------------------------

                                         Title:
                                               -------------------------

                                     -30-

 
                                    TENANT:
                                    SILICON VALLEY BANK


                                    By:
                                       ---------------------------------
         
                                         Name:
                                              --------------------------
                                          
                                         Title:
                                               -------------------------

                                    By:
                                       ---------------------------------
 
                                         Name:
                                              --------------------------
 
                                         Title:
                                               -------------------------

                                     -31-

 
                                  EXHIBIT "E"

                        DEFINITION OF OPERATING EXPENSES
                        --------------------------------


     1.   Items Included In Operating Expenses.  The term "0perating Expenses"
          ------------------------------------                                
as used in the Lease to which this Exhibit "E" is attached means: all direct
                                   -----------                              
costs and expenses of operation, maintenance and repair of the Building and the
Common Areas (as such terms are defined in the Lease), including without
limitation any expansion of same, as determined by standard accounting
practices, calculated assuming the Building is ninety-five percent (95%)
occupied in the event it is occupied in a lesser percentage, including the
following costs by way of illustration but not limitation, but excluding those
items specifically described as exceptions to Operating Expenses therein or in
Section 3 below:

          (a) Real Property Taxes and Assessments (as defined in Section 2
below), and any and all impositions and assessments imposed with respect to the
Building pursuant to any covenants, conditions and restrictions affecting the
Project, the Common Areas or the Building;

          (b) Water and sewer charges and the costs of electricity, healing,
ventilating, air conditioning and other utilities including, without limitation,
utilities surcharges and any other costs, levies or assessments resulting from
statutes or regulations promulgated by any government or quasi-government
authority, in connection with the use, occupancy or alteration of the Building
or the Premises or the parking facilities serving the Building or the Premises;

          (c) Costs of insurance obtained by Landlord pursuant to Section 19 of
the Lease; provided, however, that Operating Expenses shall not include costs
arising from earthquake insurance when included in the Base Year or, if
subsequently obtained, imputed into the Base Year;

          (d) Costs of all maintenance agreements for the Project and Common
Areas and the equipment thereon, including, but not limited to, costs of
security, exterior window cleaning, elevator, waste disposal, trash removal and
janitorial services, plumbing, healing, ventilation and air conditioning,
engineers, landscaping, gardeners and signage (other than signs of tenants of
the Building);

          (e) Costs incurred in connection with management of the Project and
Building, including, without limitation: (i) wages and salaries of all employees
engaged in the operation, maintenance or security of the Building or Common
Areas, including payroll taxes, insurance and benefits relating thereto;
provided, however, that to the extent such employees' work relates to other
properties in addition to the Building, such costs shall be reasonably allocated
by Landlord between the Building and such other properties, and provided,
further, that Operating Expenses shall not include the costs of any concierge
unless included in the Base Year or, if subsequently incurred, imputed into the
Base Year; (ii) the rental cost and overhead (including, without limitation,
cost of supplies) of any office and storage space used to provide management
services, and (ii) a management fee for the Project property manager (including
Landlord if Landlord manages the Project) consistent with management fees being
charged to tenants of space comparable in size to the Premises in other first
class office buildings in the John Wayne Airport area of Orange County,
California, determined as a percentage of Operating Expenses; provided, however,
that such management fees shall not exceed 10% of Operating Expenses;

          (f) Cost of supplies, materials, equipment and tools used in
operation, repair and maintenance of the Project and Common Areas, including
rental of personal property used for same and depreciation on a straight line
basis of personal property purchased for same;

          (g) Costs and expenses of repairs, resurfacing, repairing and other
upkeep of Common Areas, maintenance, painting, lighting, cleaning and similar
items, including appropriate reserves.

          (h) Cost of accounting, audit, verification, legal and other
consulting services and any additional services, whether or not provided to the
Project or Common Areas at the Commencement Date but thereafter provided by
Landlord in its management of the Project and Common Areas;

 
          (i) Cost of repairs and maintenance (including, without limitation,
repairs, replacements and alterations to cause the Building and the Common Areas
to comply with any law, statute or ordinance in effect after the date hereof),
and reserves reasonably deemed desirable by Landlord; any such expenditures that
constitute capital improvements shall be amortized as set forth below;

          (j) Cost of repairs and maintenance of structural portions of the
Building, including the plumbing, air conditioning, heating, ventilating, and
electrical systems installed or furnished by Landlord; any such expenditures
that constitute capital improvements shall be amortized as set forth below; and

          (k) Cost of implementing and administering any transportation
management program applicable to substantially all of the Building which may be
required by any law, statute or ordinance now or hereafter in effect.

          (l) Cost of capitalized expenditures which are (i) reasonably intended
to produce a reduction in Operating Expenses or energy consumption, but only to
the extent of the reduction; or (ii) required under any governmental law or
regulation that was not applicable to the Building at the time it was originally
constructed; or (iii) for replacement of any Building equipment or improvements
needed to operate the Building at the same quality levels as prior to the
replacement, each amortized over such reasonable period as Landlord shall
reasonably determine, together with interest at the Interest Rate on the
unamortized balance.

          Tenant shall pay within twenty (20) days of receipt of an invoice from
Landlord the cost of additional or extraordinary services provided to Tenant and
not paid or payable by Tenant pursuant to other provisions of this Lease.
Landlord shall have the right to establish and collect on an ongoing basis
reasonable reserves for items of periodic maintenance, repair and replacement
properly includable in Operating Expenses that customarily are not incurred each
year, in amounts calculated to provide sufficient funds to pay for such items
when necessary.

     2.   Real Property Taxes and Assessments.  The term "Real Property Taxes
          -----------------------------------                                
and Assessments", as used in this Exhibit "E" and the Lease, means: any form of
                                  -----------                                  
assessment, license fee, license tax, business license fee, commercial rental
tax, levy, charge, improvement bond, tax or similar imposition imposed by any
authority having the direct power to tax, including any city, county, state or
federal government, or any school, agricultural, lighting, drainage or other
improvement or special assessment district thereof, as against any legal or
equitable interest of Landlord in the Premises, Building, Common Areas or the
Project (as such terms are defined in the Lease), adjusted to reflect an
assumption that the Building is fully assessed for real property tax purposes as
a completed building ready for occupancy, including the following by way of
illustration but not limitation:

          (a) any tax on Landlord's "right" to rent or "right" to other income
from the Premises or as against Landlord's business of leasing the Premises;

          (b)  any assessment, tax, fee, levy or charge in substitution,
partially or totally, of any assessment, tax, fee, levy  or charge previously
included within the definition of real property  tax, it being acknowledged by
Tenant and Landlord that Proposition 13 was adopted by the voters of the State
of California in the June, 1978 election and that assessments, taxes, fees,
levies and charges may be imposed by governmental agencies for such services as
fire protection, street, sidewalk and road maintenance, refuse removal and for
other governmental services formerly provided without charge to property owners
or occupants;

          (c) any assessment, tax, fee, levy or charge allocable to or measured
by the area of the Premises or other premises in the Building or the rent
payable by Tenant hereunder or other tenants of the Building, including, without
limitation, any gross receipts tax or excise tax levied by state, city or
federal government, or any political subdivision thereof, with respect to the
receipt of such rent, or upon or with respect to the possession, leasing,
operation, management, maintenance, alteration, repair, use or occupancy by
Tenant of the Premises, or any portion thereof but not on Landlord's other
operations;

                                      -2-

 
          (d) any assessment, tax, fee, levy or charge upon this transaction or
any document to which Tenant is a party, creating or transferring an interest or
an estate in the Premises; and/or

          (e) any assessment, tax, fee, levy or charge by any governmental
agency related to any transportation plan, fund or system (including assessment
districts) instituted within the geographic area of which the Building is a
part.

     3.   Items Excluded From Operating Expenses.  Notwithstanding the
          --------------------------------------                      
provisions of Section 1 and Section 2 above to the contrary, "Operating
Expenses" shall not include:

          (a) Landlord's federal or state income, franchise, inheritance or
estate taxes;

          (b)  any ground lease rental;

          (c) costs incurred by Landlord for the repair of damage to the
Building to the extent that Landlord is reimbursed by insurance or condemnation
proceeds or by tenants, warrantors or other third persons;

          (d) depreciation, amortization and interest payments, except as
specifically provided herein, and except on materials, tools, supplies and
vendor-type equipment purchased by Landlord to enable Landlord to supply
services Landlord might otherwise contract for with a third party, where such
depreciation, amortization and interest payments would otherwise have been
included in the charge for such third party's services, all as determined in
accordance with standard accounting practices;

          (e) brokerage commissions, finders' fees, attorneys' fees, space
planning costs and other costs incurred by Landlord in leasing or attempting to
lease space in the Building;

          (f) interest, principal, points and fees on debt or amortization on
any mortgage, deed of trust or other debt encumbering the Building or the
Project;

          (g) costs, including permit, license and inspection costs, incurred
with respect to the installation of tenant improvements for tenants in the
Building (including the original Tenant Improvements for the Premises), or
incurred in renovating or otherwise improving, decorating, painting or
redecorating space for tenants or other occupants of the Building, including
space planning and interior design costs and fees;

          (h) attorneys' fees and other costs and expenses incurred in
connection with negotiations or disputes with present or prospective tenants or
other occupants of the Building; provided, however, that Operating Expenses will
include those reasonable attorneys' fees and other costs and expenses incurred
in connection with negotiations, disputes or claims relating to items of
Operating Expenses, enforcement of rules and regulations of the Building, and
such other matters relating to the maintenance of standards required of Landlord
under the Lease, except to the extent Landlord recovers such fees directly from
Tenant or other tenants pursuant to their lease or other agreement in question;

          (i) except for the administrative/management fees described in Section
1 above, costs of Landlord's general corporate overhead;

          (j) all items and services for which Tenant or any other tenant in the
Building reimburses Landlord (other than through operating expense pass-through
provisions);

          (k) electric power costs for which any tenant directly contracts with
the local public service company;

          (l) costs arising from Landlord's charitable or political
contributions;

          (m) costs of any extraordinary services provided to other tenants of
the Project but
not to Tenant;

                                      -3-

 
          (n) executive salaries of off-site personnel employed by Landlord,
except for the charge (or pro rata share) of the Project manager or asset
manager;

          (o) costs of reconstructing, modifying, altering or repairing any
structural portions of the Building due to defective original construction;

          (p) overhead and profit increment paid to a subsidiary, affiliate or
other entity related to Landlord for services (other than management services)
to the extent the same exceed competitive costs (taking into account the quality
of service provided in maintaining a Class-A office building) of such services
were they not so rendered by a subsidiary, affiliate or other Landlord-related
entity; and

          (q) costs incurred by Landlord for replacements which are considered
capital improvements under generally accepted accounting practices, except as
expressly permitted in Section 1 above.

                                      -4-

 
                                  EXHIBIT "F"

                      STANDARDS FOR UTILITIES AND SERVICES
                      ------------------------------------

     The following standards for utilities and services are in effect.  Landlord
reserves the right to adopt nondiscriminatory modifications and additions
thereto.  Tenant shall promptly notify Landlord, in writing, of any conflict
between the Rules and Regulations and any laws, statutes or ordinances
applicable to Tenant's particular use or manner of use or occupancy of the
Premises or the Building and Landlord and Tenant shall reasonably cooperate in
the lawful and timely resolution of such conflict.

     Provided Tenant remains in occupancy of the Premises, and is not in default
beyond applicable notice and cure periods under any of the terms, covenants,
conditions, provisions or agreements of the Lease, Landlord will provide or make
available the following utilities and services, subject to the terms, conditions
and limitations set forth herein and in the Lease:

     1.   Elevator Facilities.  Non-attended automatic elevator facilities
          -------------------                                             
Monday through Friday, except holidays, from 8 a.m. to 6 p.m.

     2.   Heating, Ventilating, Air Conditioning.  On Monday through Friday,
          --------------------------------------                            
except holidays, from 8:00 a.m. to 6:00 p.m. and on Saturday from 9:00 a.m. to
1:00 p.m. (and at other times for an additional standard hourly charge to be
fixed by Landlord, which hourly charge is currently $17.00 per hour),
ventilation, air conditioning or heating on such days and hours, when in the
reasonable judgment of Landlord it may be required for the comfortable occupancy
of the Premises.  Tenant agrees to cooperate fully at all times with Landlord,
and to abide by all reasonable regulations and requirements which Landlord may
prescribe for the proper function and protection of the air conditioning system.
Tenant agrees not to connect any apparatus, device, conduit or pipe to the air
conditioning system.  Tenant further agrees that neither Tenant nor its
servants, employees, agents, visitors, licensees or contractors shall at any
time enter the mechanical installations or facilities of the Building or the
Project or adjust, tamper with, touch or otherwise in any manner affect said
installations or facilities.  The cost of maintenance and service calls to
adjust and regulate the air conditioning system will be charged to Tenant if the
need for maintenance work results from either Tenant's adjustment of room
thermostats or Tenant's failure to comply with its obligations hereunder. Such
work will be charged at hourly rates equal to then-current journeyman's wages
for air conditioning mechanics.  When heat generating machines, equipment,
fixtures or other devices of any nature whatsoever, including by way of
illustration but not by way of limitation, computer and other electronic data
processing equipment, are used in the Premises by Tenant which affect the
temperature otherwise maintained by the air conditioning system, Landlord shall
have the right, but not the obligation, after prior written notice to Tenant to
install supplementary air conditioning units in the Premises, and the cost
thereof, including the commercially reasonable cost of installation and the
commercially reasonable cost of maintenance thereof, shall be paid by Tenant to
Landlord upon demand by Landlord, which demand shall be accompanied by
reasonable notice of the amount owing.

     3.   Electricity.  Electric current to the Premises, 24 hours per day,
          -----------                                                      
seven days a week, during the usual business hours on business days, as required
by the Building standard office lighting and fractional horsepower office
business machines including copiers, personal computers and word processing
equipment which use 110 volt electrical power, in an amount not to exceed three
(3) watts per square foot per normal business day.  Tenant agrees, should its
electrical installation or electrical consumption be in excess of the aforesaid
quantity or extend beyond normal business hours, to reimburse Landlord monthly
for the measured consumption at the average cost per kilowatt hour charged to
the Building during the period.  If a separate meter is not installed at
Tenant's cost, such excess cost will be established by an estimate reasonably
determined by Landlord or by an engineer selected in Landlord's reasonable
discretion, whose fee shall be shared equally by Landlord and Tenant.  Tenant
agrees not to use any apparatus or device in, upon or about the Premises (other
than standard office business machines, personal computers and word processing
equipment) which may in any way increase the amount of such services usually
furnished or supplied to said Premises, and Tenant further agrees not to connect
any apparatus or device with wires, conduits or pipes, or other means by which
such services are supplied, for the purpose of using additional or unusual
amounts of such services without the written consent of Landlord which shall not
be unreasonably withheld. Should Tenant use the same to excess, the refusal on
the part of Tenant to pay upon demand of Landlord the amount established by
Landlord for such excess charge will constitute a breach of the 

 
obligation to pay rent under this Lease and will entitle Landlord to the rights
therein granted for such breach. Tenant's use of electric current shall not
exceed the capacity of the feeders to the Building, or the risers or wiring
installation and Tenant shall not install or use or permit the installation or
use of any computer or electronic data processing equipment in the Premises
(except standard office business machines, personal computers and word
processing equipment) without the prior written consent of Landlord which will
not be unreasonably withheld.

     4.   Water.  Water will be available in public areas for drinking and
          -----                                                           
lavatory purposes only, but if Tenant requires, uses or consumes water for any
purpose in addition to ordinary drinking and lavatory purposes, Landlord may,
after written notice to Tenant, install a water meter and thereby measure
Tenant's water consumption for all purposes.  Tenant agrees to pay Landlord for
the cost of the meter and the cost of the installation thereof and throughout
the duration of Tenant's occupancy Tenant will keep said meter and installation
equipment in good working order and repair at Tenant's own cost and expense, in
default of which Landlord may cause such meter and equipment to be replaced or
repaired and collect the cost thereof from Tenant.  Tenant agrees to pay for
water consumed, as shown on such meter, as and when bills are rendered, and on
default in making such payment, Landlord may, after written notice to Tenant,
pay such charges and collect the same from Tenant.  Any such costs or expenses
incurred, or payments made by Landlord for any of the reasons or purposes
hereinabove stated will be deemed to be additional rent payable by Tenant and
collectible by Landlord as such.

     5.   Janitorial Service.  Landlord shall provide janitorial service during
          ------------------                                                   
the time and in the manner that janitorial service is customarily furnished in
Class A office buildings in the vicinity of the Building, provided the same are
used exclusively as offices, and are kept reasonably in order by Tenant.  Unless
otherwise agreed to by Landlord and Tenant, no one other than persons approved
by Landlord shall be permitted to enter the Premises for such purposes.  Tenant
shall pay to Landlord as additional rent the cost of removal of any of Tenant's
refuse and rubbish to the extent that the same exceeds the refuse and rubbish
usually attendant upon the use of the Premises as offices.

     6.   Miscellaneous.  Landlord also shall provide for replacement of
          -------------                                                 
Building standard lighting and Building standard toilet supplies.

     7.   Interruption of Utilities or Services.  Landlord reserves the right to
          -------------------------------------                                 
stop service of the elevator, plumbing, ventilation, air conditioning and
electrical systems, and any other services, when necessary, by reason of
accident or emergency or for reasonable repairs, alterations or improvements,
when in the reasonable judgment of Landlord such actions are desirable or
necessary to be made (provided that in such instance Landlord shall endeavor to
provide reasonable advance notice and to minimize interference with Tenant's
business), until said repairs, alterations or improvements shall have been
completed, and Landlord will have no responsibility or liability for failure to
supply elevator facilities, plumbing, ventilating, air conditioning or electric
service or other services, when prevented from so doing by strike or accident or
by any cause beyond Landlord's reasonable control, or by laws, rules, orders,
ordinances, directions, regulations or by reason of the requirements of any
federal, state, county or municipal authority or failure of gas, oil or other
suitable fuel supply or inability by exercise of reasonable diligence to obtain
gas, oil or other suitable fuel supply.  It is expressly understood and agreed
that any covenants on Landlord's part to furnish any services pursuant to any of
the terms, covenants, conditions, provisions or agreements of this Lease, or to
perform any act or thing for the benefit of Tenant, will not be deemed breached
if Landlord is unable to furnish or perform the same by virtue of a strike or
labor trouble or any other cause whatsoever beyond Landlord's control.  No
failure or interruption of utilities or services shall entitle Tenant to
terminate this Lease or abate the rent or other charges hereunder and Tenant
shall not be relieved from the performance of any covenant in this Lease because
of such failure.  In the event any municipal, state, federal or other regulatory
body (whether judicial, executive or legislative) imposes mandatory controls on
Landlord or the Building or Common Areas relating to the use or conservation of
energy or water, gas, light or electricity or the reduction of automobile use or
automobile and other emissions, Landlord may comply (and Tenant shall comply)
with such mandatory controls to the extent it can control the use of energy or
light, gas, water or electricity or the reduction of automobiles, or automobile
or other emissions on the Property or in the Building and Common Areas.
Compliance with any of the above shall not in any event constitute a partial or
complete eviction of Tenant hereunder, nor shall it entitle Tenant to any
abatement or mitigation of rent or other charges, 

                                      -2-

 
nor shall Landlord in any way be liable for damages or injury caused thereby to
Tenant, Tenant's property, business, employees, customers or suppliers.
Notwithstanding the foregoing, if Tenant is prevented from using, and does not
use, the Premises or any material portion thereof, for five (5) consecutive
business days because of an interruption or discontinuance of utilities or
services caused by the wrongful acts or omissions of Landlord, and Tenant shall
have given Landlord written notice respecting such interruption or
discontinuance, then Tenant's base monthly rent shall be abated or reduced, as
the case may be, after expiration of the applicable period of time described
above ("Eligibility Period"), if any, for such time that Tenant continues to be
so prevented from using, and does not use, the rentable area of the portion of
the Premises that Tenant is prevented from using, and does not use, based on the
ratio that the unusable portion bears to the total rentable area of the
Premises; provided however, if Tenant reoccupies and conducts its business from
any portion of the Premises during such period, the rent allocable to such
reoccupied portion, based on the proportion that the rentable area of such
reoccupied portion of the Premises bears to the total rentable area of the
Premises, shall be payable by Tenant from the date such business operations
commence; and provided further that the rent abatement described above shall in
no event continue after the time such utilities or services are restored.

                                      -3-

 
                                  EXHIBIT "G"

                              ESTOPPEL CERTIFICATE
                              --------------------

     The undersigned, ________________________________________, with a mailing
address c/o _________________________________________ ("Tenant"), hereby
certifies to McDonnell Douglas Realty Company, a California corporation
("Landlord") and __________________________________, as follows:

     1.   Attached hereto is a true, correct and complete copy of that certain
lease dated ______________________, 19___, between Landlord and Tenant (the
"Lease"), regarding the premises located at __________________________________
(the "Premises").  The Lease is now in full force and effect and has not been
amended, modified or supplemented, except as set forth in Section 4 below.

     2.   The Term of the Lease commenced on _______________, 19___.

     3.   The Term of the Lease shall expire on _______________, 19___.

     4.   The Lease has:  (initial one)

          (_____) not been amended, modified, supplemented, extended, renewed or
          assigned.

          (_____) been amended, modified, supplemented, extended, renewed or
          assigned by the following described terms or agreements, copies of
          which are attached hereto:

     5.   Tenant has accepted and is now in possession of the Premises.

     Tenant and Landlord acknowledge that Landlord's interest in the Lease will
be assigned to ________________ and that no modification, adjustment, revision
or cancellation of the Lease or amendments thereto shall be effective unless
written consent of ___________________________ is obtained, and that until
further notice, payments under the Lease may continue as heretofore.

     6.   The amount of Monthly Base Rent is $_____________________.

     7.   The amount of security deposits (if any) is $ ________________.  No
other security deposits have been made except as follows:

     ___________________________________________________________

     8.   Tenant is paying the full lease rental which has been paid in full as
of the date hereof. No rent or other charges under the Lease have been paid for
more than thirty (30) days in advance of its due date except as follows:

     ___________________________________________________________

     9.   All work required to be performed by Landlord under the Lease has been
completed except as follows:

     ___________________________________________________________

     10.  There are no defaults on the part of the Landlord or Tenant under the
Lease except as follows:

     ___________________________________________________________

     11.  Neither Landlord nor Tenant has any defense as to its obligations
under the Lease and claims no set-off or counterclaim against the other party
except as follows:

     ___________________________________________________________
     ___________________________________________________________

 
     12.  Tenant has no right to any concession (rental or otherwise) or similar
compensation in connection with renting the space it occupies other than as
provided in the Lease except as follows:
___________________________________________________________.  All provisions of
the Lease and the amendments thereto (if any) referred to above are hereby
ratified.

     The foregoing certification is made with the knowledge that
__________________________ __________________________ is about to fund a loan to
Landlord or _________________ is about to purchase the Project (or part thereof)
from Landlord and that _____________________________ is relying upon the
representations herein made in funding such loan or in purchasing the Project
(or part thereof).

     IN WITNESS WHEREOF, this certificate has been duly executed and delivered
by the authorized officers of the undersigned as of _______________, 19___.


                                    TENANT:


                                    By:________________________________________
                                         Printed Name:_________________________
                                         Title:________________________________


                                  SAMPLE ONLY
                              [NOT FOR EXECUTION]



                                      -2-

 
                                  EXHIBIT "H"

                             RULES AND REGULATIONS
                             ---------------------


     A.   General Rules and Regulations.  The following rules and regulations
          -----------------------------                                      
govern the use of the Building and the Project Common Areas.  Tenant will be
bound by such rules and regulations and agrees to cause Tenants Authorized
Users, its employees, subtenants, assignees, contractors, suppliers, customers
and invitees to observe the same.

          1.   Except as specifically provided in the Lease to which these Rules
and Regulations are attached, no sign, placard, picture, advertisement, name or
notice may be installed or displayed on any part of the outside or inside of the
Building or the Project without the prior written consent of Landlord.  Landlord
will have the right to remove, at Tenants expense and without notice, any sign
installed or displayed in violation of this rule.  All approved signs or
lettering on doors and walls are to be printed, painted, affixed or inscribed at
the expense of Tenant and under the direction of Landlord by a person or company
designated or approved by Landlord.

          2.   If Landlord reasonably objects in writing to any curtains,
blinds, shades, screens or hanging plants or other similar objects attached to
or used in connection with any window or door of the Premises, or placed on any
window sill, which is visible from the exterior of the Premises, Tenant will
immediately discontinue such use.  Tenant agrees not to place anything against
or near glass partitions or doors or windows which may appear unsightly from
outside the Premises including from within any interior common areas.

          3.   Tenant will not obstruct any sidewalks, halls, passages, exits,
entrances, elevators, escalators, or stairways of the Project.  The halls,
passages, exits, entrances, elevators and stairways are not open to the general
public, but are open, subject to reasonable regulations, to Tenant's business
invitees.  Landlord will in all cases retain the right to control and prevent
access thereto of all persons whose presence in the reasonable judgment of
Landlord would be prejudicial to the safety, character, reputation and interest
of the Project and its tenants, provided that nothing herein contained will be
construed to prevent such access to persons with whom any tenant normally deals
in the ordinary course of its business, unless such persons are engaged in
illegal or unlawful activities.  No tenant and no employee or invitee of any
tenant will go upon the roof of the Building.

          4.   Tenant will not obtain for use on the Premises ice, drinking
water, food, food vendors, beverage, towel or other similar services upon the
Premises, except under such reasonable regulations as may be fixed by Landlord;
provided, however, that nothing herein shall be deemed to permit Landlord to
prohibit Tenant from obtaining pizza delivery, lunch catering, coffee and water
services and the like.  Landlord expressly reserves the right to absolutely
prohibit solicitation, canvassing, sales and displays of products, goods and
wares in all portions of the Project except for such activities as may be
expressly requested by a tenant and conducted solely within such requesting
tenant's premises.  Landlord reserves the right to restrict and regulate the use
of the common areas of the Project and Building by invitees of tenants providing
services to tenants on a periodic or daily basis including food and beverage
vendors.  Such restrictions may include reasonable limitations on time, place,
manner and duration of access to a tenant's premises for such purposes.  Without
limiting the foregoing, Landlord may require that such parties use service
elevators, halls, passageways and stairways for such purposes to preserve access
within the Building for tenants and the general public.

          5.   Landlord reserves the right to require tenants to periodically
provide Landlord with a written list of any and all business invitees which
regularly provide goods and services to such tenants at the premises.

          6.   Landlord reserves the right to exclude from the Building between
the hours of 6 p.m. and 8 a.m. the following business day, or such other hours
as may be established from time to time by Landlord, and on Sundays and legal
holidays, any person unless that person is known to the person or employee in
charge of the Building or has a pass or is properly identified.  Tenant will be
responsible for all persons for whom it requests passes and will be liable to
Landlord for all acts of such persons.  Landlord will not be liable for damages
for any error with regard to the admission to or exclusion from the Building of
any person.  Landlord reserves the right to prevent access to the 

 
Building in case of invasion, mob, riot, public excitement or other commotion by
closing the doors or by other appropriate action.

          7.   The directory of the Building or the Project will be provided
exclusively for the display of the name and location of tenants only and
Landlord reserves the right to exclude any other names therefrom.

          8.   All cleaning and janitorial services for the Project and the
Premises will be provided exclusively through Landlord, and except with the
written consent of Landlord, no person or persons other than those approved by
Landlord will be employed by Tenant or permitted to enter the Project for the
purpose of cleaning the same.  Tenant will not cause any unnecessary labor by
carelessness or indifference to the good order and cleanliness of the Premises.

          9.   Landlord will furnish Tenant, free of charge, with two keys to
each door lock in the Premises.  Landlord may make a reasonable charge, not to
exceed $4.00 per key, for any additional keys.  Tenant shall not make or have
made additional keys, and Tenant shall not alter any lock or install any new
additional lock or bolt on any door of the Premises.  Tenant, upon the
termination of its tenancy, will deliver to Landlord the keys to all doors which
have been furnished to Tenant and in the event of loss of any keys so furnished,
will pay Landlord therefor.

          10.  If Tenant requires telegraphic, telephonic, burglar alarm,
satellite dishes, antennae or similar services, it will first obtain Landlord's
approval, and comply with, Landlord's reasonable rules and requirements
applicable to such services, which may include separate licensing by, and fees
paid to, Landlord.  Landlord acknowledges that alarm systems installed in
connection with Tenant's operation of a banking branch office and maintenance of
a safe are deemed approved, subject to compliance with the Lease provisions
regarding Alteration.

          11.  Freight elevator(s) will be available for use by all tenants in
the Building, subject to such reasonable scheduling as Landlord, in its
discretion, deems appropriate.  No equipment, materials, furniture, packages,
supplies, merchandise or other property will be received in the Building or
carried in the elevators except between such hours and in such elevators as may
be designated by Landlord.  Tenant's initial move in and subsequent deliveries
of bulky items, such as furniture, safes and similar items will, unless
otherwise agreed in writing by Landlord, be made during the hours of 6:00 p.m.
to 6:00 a.m. or on Saturday or Sunday.  Deliveries during normal office hours
shall be limited to normal office supplies and other small items.  No deliveries
will be made which impede or interfere with other tenants or the operation of
the Building.

          12.  Tenant will not place a load upon any floor of the Premises which
exceeds the load per square foot which such floor was designed to carry and
which is allowed by law.  Landlord will have the right to prescribe the weight,
size and position of all equipment, materials, furniture or other property
brought into the Building.  Heavy objects will, if considered necessary by
Landlord, stand on such platforms as determined by Landlord to be necessary to
properly distribute the weight, which platforms will be provided at Tenant's
expense.  Business machines and mechanical equipment belonging to Tenant, which
cause noise or vibration that may be transmitted to the structure of the
building or to any space therein to such a degree as to be objectionable to any
tenants in the Building or Landlord, are to be placed and maintained by Tenant,
at Tenant's expense, on vibration eliminators or other devises sufficient to
eliminate noise or vibration.  The persons employed to move such equipment in or
out of the Building must be reasonably acceptable to Landlord.  Landlord will
not be responsible for loss of, or damage to, any such equipment or other
property from any cause, and all damage done to the Building by maintaining or
moving such equipment or other property will be repaired at the expense of
Tenant.

          13.  Tenant will not use or keep in the Premises any kerosene,
gasoline or inflammable or combustible fluid or material other than those
limited quantities necessary for the operation or maintenance of office
equipment.  Tenant will not use or permit to be used in the Premises any foul or
noxious gas or substance, or permit or allow the Premises to be occupied or used
in a manner offensive or objectionable to Landlord or other occupants of the
Building by reason of noise, odors or vibrations, nor will Tenant bring into or
keep in or about the Premises any birds or animals.

                                      -2-

 
          14.  Tenant will not use any method of heating or air conditioning
other than that supplied by Landlord without Landlord's prior written consent.

          15.  Tenant will not waste electricity, water or air conditioning and
agrees to cooperate fully with Landlord to assure the most effective operation
of the Building's heating and air conditioning and to comply with any
governmental energy-saving rules, laws or regulations of which Tenant has actual
notice, and will refrain from attempting to adjust controls.  Tenant will keep
corridor doors closed, and shall keep all window coverings pulled down.

          16.  Landlord reserves the right, exercisable without notice and
without liability to Tenant, to change the name of the Building.  Without the
written consent of Landlord, Tenant will not use the name of the Building or the
Project in connection with or in promoting or advertising the business of Tenant
except as Tenant's address.

          17.  Tenant will close and lock the doors of its Premises and entirely
shut off all water faucets or other water apparatus, and lighting or gas before
Tenant and its employees leave the Premises.  Tenant will be responsible for any
damage or injuries sustained by other tenants or occupants of the Building or by
Landlord for noncompliance with this rule.

          18.  The toilet rooms, toilets, urinals, wash bowls and other
apparatus will not be used for any purpose other than that for which they were
constructed and no foreign substance of any kind whatsoever shall be thrown
therein.  The expense of any breakage, stoppage or damage resulting from any
violation of this rule will be borne by the tenant who, or whose employees or
invitees, break this rule.  Cleaning of equipment of any type is prohibited.

          19.  Tenant will not sell, or permit the sale at retail of magazines,
newspapers, periodicals, theater tickets or any other goods or merchandise to
the general public in or on the Premises.  Tenant will not make any room-to-room
solicitation of business from other tenants in the Project.  Tenant will not use
the Premises for any business or activity other than that specifically provided
for in this Lease.  Canvassing, soliciting and distribution of handbills or any
other written material, and peddling in the Project are prohibited, and Tenant
will cooperate with Landlord to prevent such activities.

          20.  Tenant will not install any radio or television antenna,
loudspeaker, satellite dishes or other devices on the roof(s) or exterior walls
of the Building or the Project.  Tenant will not interfere with radio or
television broadcasting or reception from or in the Project or elsewhere.

          21.  Except for the ordinary hanging of pictures and wall decorations,
Tenant will not mark, drive nails, screw or drill into the partitions, woodwork
or plaster or in any way deface the Premises or any part thereof, except in
accordance with the provisions of the Lease pertaining to alterations.  Landlord
reserves the right to direct electricians as to where and how telephone and
telegraph wires are to be introduced to the Premises.  Tenant will not cut or
bore holes for wires. Tenant will not affix any floor covering to the floor of
the Premises in any manner except as approved by Landlord.  Tenant shall repair
any damage resulting from noncompliance with this rule.

          22.  Tenant will not install, maintain or operate upon the Premises
any vending machines without the written consent of Landlord which will not be
unreasonably withheld.

          23.  Landlord reserves the right to exclude or expel from the Project
any person who, in Landlord's judgment, is intoxicated or under the influence of
liquor or drugs or who is in violation of any of the Rules and Regulations of
the Building.

          24.  Tenant will store all its trash and garbage within its Premises
or in other facilities provided by Landlord.  Tenant will not place in any trash
box or receptacle any material which cannot be disposed of in the ordinary and
customary manner of trash and garbage disposal.  All garbage and refuse disposal
is to be made in accordance with directions issued from time to time by
Landlord.

                                      -3-

 
          25.  The Premises will not be used for lodging or for the storage of
merchandise held for sale to the general public, or for lodging or for
manufacturing of any kind, nor shall the Premises be used for any improper,
immoral or objectionable purpose.  No cooking will be done or permitted on the
Premises without Landlord's consent, except the use by Tenant of Underwriters'
Laboratory approved equipment for brewing coffee, tea, hot chocolate and similar
beverages shall be permitted, and the use of a microwave oven for employees use
will be permitted, provided that such equipment and use is in accordance with
all applicable federal, state, county and city laws, codes, ordinances, rules
and regulations.

          26.  Neither Tenant nor any of its employees, agents, customers and
invitees may use in any space or in the public halls of the Building or the
Project any hand truck except those equipped with rubber tires and side guards
or such other material-handling equipment as Landlord may approve.  Tenant will
not bring any other vehicles of any kind (except for motorized wheelchairs) into
the Building.

          27.  Tenant agrees to comply with all safety, fire protection and
evacuation procedures and regulations established by Landlord or any
governmental agency.

          28.  Tenant assumes any and all responsibility for protecting its
Premises from theft, robbery and pilferage, which includes keeping doors locked
and other means of entry to the Premises closed.

          29.  To the extent Landlord reasonably deems it necessary to exercise
exclusive control over any portions of the Common Areas for the mutual benefit
of the tenants in the Building or the Project, Landlord may do so subject to
reasonable, non-discriminatory additional rules and regulations.

          30.  Landlord may prohibit smoking in the Building and may require
Tenant and any of its employees, agents, clients, customers, invitees and guests
who desire to smoke, to smoke within designated smoking areas within the
Project.

          31.  Tenant's requirements will be attended to only upon appropriate
application to Landlord's asset management office for the Project by an
authorized individual of Tenant.  Employees of Landlord will not perform any
work or do anything outside of their regular duties unless under special
instructions from Landlord.

          These Rules and Regulations are in addition to, and will not be
construed to in any way modify or amend, in whole or in part, the terms,
covenants, agreements and conditions of the Lease.  Landlord may waive any one
or more of these Rules and Regulations for the benefit of Tenant or any other
Tenant, but no such waiver by Landlord will be construed as a waiver of such
Rules and Regulations in favor of Tenant or any other tenant, nor prevent
Landlord from thereafter enforcing any such Rules and Regulations against any or
all of the tenants of the project.

          Landlord reserves the right to make such other reasonable and non-
discriminatory Rules and Regulations as, in its judgment, may from time to time
be needed for safety and security, for care and cleanliness of the Project and
for the preservation of good order therein. Tenant agrees to abide by all such
Rules and Regulations hereinabove stated and any additional reasonable and non-
discriminatory rules and regulations which are adopted.  Tenant is responsible
for the observance of all of the foregoing rules by Tenant's employees, agents,
clients, customers, invitees and guests.

     B.   Parking Rules and Regulations.  The following rules and regulations
          -----------------------------                                      
govern the use of the parking facilities which serve the Building.  Tenant will
be bound by such rules and regulations and agrees to cause its employees,
subtenants, assignees, contractors, suppliers, customers and invitees to observe
the same:

          1.   Tenant will not permit or allow any vehicles that belong to or
any controlled by Tenant or Tenant's employees, subtenants, customers or
invitees to be loaded, unloaded or parked in areas other than those designed by
Landlord for such activities.  No vehicles are to be left in the parking areas
overnight and no vehicles are to be parked in the parking areas other than
normally
                                      -4-

 
sized passenger automobiles, motorcycles and pick-up trucks. No extended term
storage of vehicles is permitted.

          2.   Vehicles must be parked entirely within painted stall lines of a
single parking stall.

          3.   All directional signs and arrows must be observed.

          4.   The speed limit within all parking areas shall be five (5) miles
per hour.

          5.   Parking is prohibited:

               in areas not striped for parking;

               in aisles or on ramps;

               WHERE "no parking" signs are posted;

               in cross-hatched areas; and

               in such other areas as may be designated from time to time by
          Landlord or Landlord's parking operator.

          6.   Landlord reserves the right, without cost or liability to
Landlord, to tow any vehicle if such vehicle's audio theft alarm system remains
engaged for an unreasonable period of time.

          7.   Washing, waxing, cleaning or servicing of any vehicle in any area
not specifically reserved for such purpose is prohibited.

          8.   Landlord may refuse to permit any person to park in the parking
facilities who violates these rules with unreasonable frequency, and any
violation of these rules shall subject the violator's car to removal, at such
car owner's expense.  Tenant agrees to use its best efforts to acquaint its
employees, subtenants, assignees, contractors, suppliers, customers and invitees
with these parking provisions, rules and regulations.

          9.   Parking stickers, access cards, or any other device or form or
identification supplied by Landlord as a condition of use of the parking
facilities shall remain the property of Landlord.  Parking identification
devices, if utilized by Landlord, must be displayed as requested and may not be
mutilated in any manner.  The serial number of the parking identification device
may not be obliterated.  Parking identification devices, if any, are not
transferable and any device in the possession of an unauthorized holder will be
void.  Landlord reserves the right to refuse the sale of monthly stickers or
other parking identification devices to Tenant or any of its agents, employees
or representatives who willfully refuse to comply with these rules and
regulations and all unposted city, state or federal ordinances, laws or
agreements.

          10.  Loss or theft of parking identification devices or access cards
must be reported to the management office in the Project immediately, and a lost
or stolen report must be filed by the Tenant or user of such parking
identification device or access card at the time.  Landlord has the right to
exclude any vehicle from the parking facilities that does not have a parking
identification device or valid access card.  Any parking identification device
or access card which is reported lost or stolen and which is subsequently found
in the possession of an unauthorized person will be confiscated and the illegal
holder will be subject to prosecution.

          11.  All damage or loss claimed to be the responsibility of Landlord
must be reported, itemized in writing and delivered to the management office
located within the Project within ten (10) business days after any claimed
damage or loss occurs.  Any claim not so made is waived.  Landlord is not
responsible for damage by water or fire, or for the acts or omissions of others,
or for articles left in vehicles.  In any event, the total liability of
Landlord, if any, is limited to Two Hundred Fifty Dollars ($250.00) for all
damages or loss to any car.  Landlord is not responsible for loss of use.

                                      -5-

 
          12.  The parking operators, managers or attendants are not authorized
to make or allow any exceptions to these rules and regulations, without the
express written consent of Landlord. Any exceptions to these rules and
regulations made by the parking operators, managers or attendants without the
express written consent of Landlord will not be deemed to have been approved by
Landlord.

          13.  Landlord reserves the right, without cost or liability to
Landlord, to tow any vehicles which are used or parked in violation of these
rules and regulations.

          14.  Landlord reserves the right from time to time to modify and/or
adopt such other reasonable and non-discriminatory rules and regulations for the
parking facilities as it deems reasonably necessary for the operation of the
parking facilities.

                                      -6-

 
                                  EXHIBIT "B"



                             18872 MacArthur Blvd.

                                 #150 1,361 RSF

 
                             OFFICE BUILDING LEASE
                             ---------------------


     THIS OFFICE BUILDING LEASE ("Lease") is entered into as of the ___ day of
__________, 1995 by and between McDonnell Douglas Realty Company, a California
corporation ("Landlord"), and Silicon Valley Bank ("Tenant").

     1.   BASIC LEASE TERMS.  For purposes of this Lease, the following terms
          -----------------                                                  
have the following definitions and meanings:

          (a) Landlord:  McDonnell Douglas Realty Company, a California
              --------                                                 
corporation.

          (b)  Landlord's Address:
               ------------------ 

               McDonnell Douglas Realty Company
               4060 Lakewood Boulevard
               6th Floor
               Long Beach, CA 90808-1700
               Attention:  Lease Administrator

with a copy to:

               Prentiss Properties
               18881 Von Karman Avenue, Suite 1225
               Irvine, CA 92715
               Attention:  Property Manager

or such other place(s) as Landlord may from time to time designate by notice to
Tenant.

          (c)  Tenant:  Silicon Valley Bank
               ------                      

          (d)  Tenant's Address:
               ---------------- 

               After the Commencement Date, to the Premises
               with a copy to:

               Glen G. Simmons, Executive Vice President
               Human Resources & Administration
               Silicon Valley Bank
               3003 Tasman Drive, NC 830
               Santa Clara, California 95054

               Prior to the Commencement Date:
               4600 Campus Drive
               Suite 105
               Newport Beach, California 92660

          (e) Project:  The real property commonly known as Douglas Plaza and
              -------                                                        
located in the City of Irvine ("City"), County of Orange ("County"), State of
California ("State"), as shown on the site plan attached hereto as Exhibit "A".
                                                                   ----------- 

          (f) Building:  The office building located within the Development,
              --------                                                      
containing approximately 45,454 rentable square feet, with the street address of
18872 MacArthur Boulevard, Irvine, California 92715.

          (g) Premises:  The premises outlined on the floor plan attached hereto
              --------                                                          
as Exhibit "B", located on the first floor of the Building, in Suite 100
   -----------                                                          
containing 8,197 rentable square feet and 7,452 usable square feet.

          (h) Tenant's Percentage:  Tenant's percentage of the Building on a
              -------------------                                           
rentable square foot basis, which initially is 17.90%.

 
          (i)

          (j) Target Commencement Date:  March 1, 1996.
              ------------------------                 

          (k) Commencement Date:  The earlier to occur of (i) the date Landlord
              -----------------                                                
notifies Tenant that the Tenant Improvements are Substantially Completed (as
defined in Exhibit "C" attached hereto), or (ii) the date Tenant occupies all or
           -----------                                                          
a portion of the Premises for the purpose of conducting Tenant's business.

          (l)  Initial Monthly Base Rent:
               ------------------------- 

          (m) Adjustment to Monthly Base Rent:  Monthly Base Rent will be
              -------------------------------                            
adjusted in accordance with the following:

 
               LEASE YEAR OR MONTHS     MONTHLY BASE RENT
               --------------------     -----------------
 

          (n)  Option Term Rent:
               ---------------- 

          (o)  Security Deposit:
               ---------------- 

          (p) Tenant Improvements:  All tenant improvements installed or to be
              -------------------                                             
installed by Landlord or Tenant within the Premises to prepare the Premises for
occupancy pursuant to the terms of the Work Letter Agreement attached hereto as
Exhibit "C".
- ----------- 

          (q) Tenant Improvement Allowance:  See Work Letter Agreement attached
              ----------------------------                                     
hereto as Exhibit "C".
          ----------- 
 
          (r) Permitted Use:  General office, banking and/or related uses in
              -------------                                                 
compliance with applicable laws, and no other use without the express written
consent of Landlord, which consent Landlord may withhold in its sole and
absolute discretion.

          (s)  Parking Spaces:
               -------------- 

          (t)  Initial Monthly Parking Rent:
               ---------------------------- 

          (u)  Base Year:  1996.
               ---------        

          (v)  Broker(s):
               --------- 

               Tenant's Broker:     C8/Madison, Jeff Shepard
               Landlord's Broker:   Prentiss Properties Limited, Inc.

          (w) Interest Rate:  shall mean the greater of ten percent (10%) per
              -------------                                                  
annum or two percent (2%) in excess of the prime lending or reference rate of
Wells Fargo Bank N.A. or any successor bank in effect on the twenty-fifth (25th)
day of the calendar month immediately prior to the event giving rise to the
Interest Rate imposition; provided, however, the Interest Rate will in no event
exceed the maximum Interest Rate permitted to be charged by applicable law.

          (x)  Guarantor(s):  n/a
               ------------      

                                      -2-

 
          (y) Exhibits:  A through I, inclusive, which Exhibits are attached to
              --------                                                         
this Lease and incorporated herein by this reference.  As provided in Section 3,
a completed version of Exhibit "D" will be delivered to Tenant after Landlord
delivers possession of the Premises to Tenant.

          (z) Addendum:  The Addendum, if any, attached to this Lease and
              --------                                                   
incorporated herein by this reference.

     2.   PREMISES AND COMMON AREAS.
          ------------------------- 
 
          (a) Premises.  Landlord hereby leases to Tenant and Tenant hereby
              --------                                                     
leases from Landlord, without representation or warranty, express or implied,
the Premises described in Subsection 1(g).  The rentable square feet and usable
square feet of the Premises and the Building set forth above in Section 1 shall
be deemed to be the rentable square feet and usable square feet of the Premises
and Building for all purposes, whether the actual rentable square feet or usable
square feet may

                                      -3-

 
                            AMENDMENT NO. 1 TO LEASE
                            ------------------------

     This Amendment to Lease (this "Amendment") is entered into as of March 29,
1996 between MCDONNELL DOUGLAS REALTY COMPANY, a California corporation
("Landlord") and SILICON VALLEY BANK, a California corporation ("Tenant").

                                    RECITALS
                                    --------

     A.   Tenant is the tenant under that certain Douglas Plaza Office lease
dated, December 1, 1995 (the "Lease") covering certain premises (the "Premises")
within the building (the "Building") commonly known as 18872 MacArthur
Boulevard, City of Irvine, County of Orange, California, which Premises are
describe as Suite 100 on the first floor of the Building containing
approximately 8,197 rentable square feet, all as more particularly set forth in
the Lease.

     B.   Tenant desires to modify the Premises by adding thereto a portion of
the first floor of the Building, consisting of approximately 227 rentable square
feet, and Landlord has agreed to do so on the terms and conditions set forth
herein.

     NOW, THEREFORE, in consideration of the mutual covenants herein contained
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, Landlord and Tenant agree as follows (capitalized
terms used and not otherwise defined herein shall have the meanings given in the
Lease).
                                   AGREEMENT
                                   ---------

     1.   Modification of Premises.  Upon the terms and conditions set forth in
          ------------------------                                             
this Amendment No. 1, effective as of the Effective Date (as hereinafter
defined), the Premises shall be and hereby are amended to add and include 227
rentable square feet, as depicted on Exhibit A attached hereto and incorporated
                                     ---------                                 
herein and to the Lease by this reference.  From and after the Effective Date,
all references herein and in the Lease to the "Premises" shall mean, unless the
context clearly indicates to the contrary, the Premises described in the Lease
together with the additional 227 rentable square footage as described herein.
The Premises, as amended hereby, contains in the aggregate approximately 8,424
rentable square feet.

     2.   Tenant Improvements.  The Plans identified in Schedule 1 to the Work
          -------------------                                                 
Letter Agreement attached as Exhibit "C" to the Lease are hereby amended to
include the revisions thereto dated February 7, 1996 prepared by Landlord's
architect, incorporating the additional square footage described above.  It is
expressly understood that any changes to the Plans requested by Tenant
subsequent to the exception of the Lease and this subsequent Amendment shall be
treated as a change (and Tenant Lease shall be treated as a change) (and Tenant
shall be responsible for all costs attributable thereto) as described in the
above referenced Work Letter Agreement.

     3.   Base Rent; Operating Expenses.  The Base Rent and Tenant's
          -----------------------------                             
proportionate share of Operating Expenses set forth in the Lease shall be
increased to reflect the additional square footage added to the Premises
pursuant to this Amendment.  Accordingly, Subsection 1.(l) and 1.(h) of the Base
Lease Provisions are hereby replaced with the following:

          "(i) Initial Monthly Base Rent:
               ------------------------- 

          "(h) Tenant's Percentage:  Tenant's percentage of the Building on a
               -------------------                                           
rentable square foot basis, which initially is 18.53%."

     4.   Security Deposit:  The parties acknowledge that Landlord currently is
          ----------------                                                     
holding a ________ Security Deposit from Tenant.  Concurrently with the
execution of this Amendment, Tenant shall provide Landlord with additional
security in the amount of _____ for a total Security Deposit of ________________
and agrees that Landlord shall retain the total of such above amounts as
security for the Lease, which shall be governed by the provisions in the Lease
with respect to Security Deposit.

 
     5.   Confirmations.  Tenant hereby certifies and confirms to Landlord that
          -------------                                                        
as of Tenant's execution and delivery hereof, Landlord is not in default under
the Lease and Tenant has no claims, defense or offset with respect to the Lease.

     6.   Entire Agreement.  The Lease, as affected by this Amendment, contains
          ----------------                                                     
the entire agreement of Landlord and Tenant and is hereby reaffirmed, and the
provisions thereof, as so affected, shall remain in full force and effect.
Without limiting the generality of the foregoing, all provisions of the Lease
which could be reasonably and logically construed as applicable to this
Amendment shall apply to this Amendment as well as the Lease, and those
provisions of the Lease which are specifically superseded by or clearly
inconsistent with the provisions of this Amendment shall have no further
application.

     7.   Further Assurances.  Tenant shall, upon request by Landlord, execute
          ------------------                                                  
and deliver such documentation and information and take such action as may be
action as may be reasonably necessary to effectuate the intent of this Amendment
or to implement the provisions hereof.

     IN WITNESS WHEREOF, the parties have entered into this Amendment as of the
day and year first written above.

Landlord:           MCDONNELL DOUGLAS REALTY COMPANY,
                    a California corporation


                    By:
                       --------------------------------
                         Stephen J. Barker
                         Director of Business Operations


Tenant:             SILICON VALLEY BANK,
                    a California corporation


                    By:
                       --------------------------------

                    Print Name:
                               ------------------------
 
                         Its:
                             --------------------------

                                      -2-

 
                                   EXHIBIT A
                                   ---------

                       DEPICTION OF ADDITION TO PREMISES


                                      -3-

 
                            AMENDMENT NO. 2 TO LEASE
                            ------------------------

     This Amendment No. 2 to Lease (this "Amendment") is entered into as of June
1, 1996, (the "Effective Date") between MCDONNELL DOUGLAS REALTY COMPANY, a
California corporation ("Landlord") and SILICON VALLEY BANK, a California
corporation ("Tenant").

                                    RECITALS
                                    --------

     A.   Tenant is the tenant under that certain Douglas Plaza Office Lease
dated, December 1, 1995 and Amendment No. 1 to Lease dated March 29, 1996
(collectively the "Lease") covering certain premises (the "Premises") within the
building (the "Building") commonly known as 18872 MacArthur Boulevard, City of
Irvine, County of Orange, California, which Premises are described as Suite 100
on the first floor of the Building containing approximately 8,424 rentable
square feet, all as more particularly set forth in the Lease.

     B.   Tenant desires to amend the Lease to, among other things, (i) expand
the Premises to include the remainder of the first floor of the Building to be
known as Suite 100, consisting of approximately 1,361 rentable square feet and
1,237 usable square feet, as generally depicted on Exhibit A attached hereto
(the "Additional Premises"); and (ii) provide for certain additional amendments
and modifications to the Lease occasioned by the addition of the Additional
Premises.

     NOW, THEREFORE, in consideration of the mutual covenants herein contained
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, Landlord and Tenant agree as follows (capitalized
terms used and not otherwise defined herein shall have the meanings given in the
Lease).

                                   AGREEMENT
                                   ---------

     1.   Modification of Premises.  Upon the terms and conditions set forth in
          ------------------------                                             
this Amendment No. 2, effective as of the Effective Date the Premises shall be
and hereby are amended to add and include the Additional Premises.  From and
after the Effective Date, all references herein and in the Lease to the
"Premises" shall mean, unless the context clearly indicates to the contrary, the
Premises described in the Lease together with the Additional Premises
(containing in the aggregate approximately 9,785 rentable square feet and 8,895
usable square feet) and Exhibit A shall mean Exhibit A to the Lease together
                        ---------            ---------                      
with Exhibit A to this Amendment.
     ---------                   

     2.   Condition of Premises.  Tenant acknowledge and agrees that (i) Tenant
          ---------------------                                                
has inspected the Premises and accepts them as being in good and sanitary order,
condition and repaid, (ii) Landlord has made no representation and has given no
warranty to Tenant regarding the Premises, including, without limitation, any
representation or warranty regarding the fitness of the Premises for Tenant's
intended use or for any other purpose, and (iii) Tenant shall accept and occupy
the premises in its "AS IS" condition and "WITH ALL FAULTS."

     3.   Base Rent; Operating Expenses.  The Base Rent and Tenant's
          -----------------------------                             
proportionate share of Operating Expenses set forth in the Lease shall be
increased to reflect the additional square footage added to the Premises
pursuant to this Amendment.  Accordingly, Subsection 1.(h) and 1.(i) of the Base
Lease Provisions are hereby replaced with the following:

          "(h) Tenant's Percentage:  Tenant's percentage of the Building on a
               -------------------                                           
rentable square foot basis, which initially is 21.53%."

          "(i) Initial Monthly Base Rent:
               ------------------------- 


     4.   Security Deposit.  The parties acknowledge that Landlord currently is
          ----------------                                                     
holding a ________ Security Deposit from Tenant.  Concurrently with the
execution of this Amendment, Tenant shall provide Landlord with additional
security in the amount of _____ (for a total Security Deposit of
_______________) and agrees that Landlord shall retain the total of such above
amounts as security for the Lease, which shall be governed by the provisions in
the Lease with respect to Security Deposit.

 
     5.   Parking.
          ------- 


     6.   Confirmations.  Tenant hereby certifies and confirms to Landlord that
          -------------                                                        
as of Tenant's execution and delivery hereof, Landlord is not in default under
the Lease and Tenant has no claims, defense or offset with respect to the Lease.

     7.   Entire Agreement.  The Lease, as affect by this Amendment, contains
          ----------------                                                   
the entire agreement of Landlord and Tenant and is hereby reaffirmed, and the
provisions thereof, as so affected, shall remain in full force and effect.
Without limiting the generality of the foregoing, all provisions of the Lease
which could be reasonably and logically construed as applicable to this
Amendment shall apply to this Amendment as well as the Lease, and those
provisions of the Lease which are specifically superseded by or clearly
inconsistent with the provisions of this Amendment shall have no further
application.

     8.   Further Assurances.  Landlord and Tenant shall, upon request of the
          ------------------                                                 
other, execute and deliver such documentation and information and take such
other action as may be reasonably mecessary to effectuate the intent of this
Amendment or to implement the provisions hereof.

     IN WITNESS WHEREOF, the parties have entered into this Amendment as of the
day and year first written above.


Landlord:           MCDONNELL DOUGLAS REALTY COMPANY,
                    a California corporation


                    By:
                       -------------------------------- 

                       -------------------------------- 

                       -------------------------------- 
 


Tenant:             SILICON VALLEY BANK,
                    a California corporation


                    By:
                       --------------------------------

                    Print Name:
                               ------------------------

                         Its:
                             --------------------------

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                                   EXHIBIT A
                                   ---------

                             18872 MacArthur Blvd.

                                 #150 1,361 RSF



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