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	•	our ability to scale our operations in response to changes in demand for our existing products and services or demand for new products requested by our customers;
	•	intellectual property disputes, customer indemnification claims and other types of litigation risks;
	•	the gain or loss of a key customer, design win or order;
	•	our dependence on a few significant customers for a substantial portion of our revenue;
	•	the timing, rescheduling or cancellation of significant customer orders and our ability, as well as the ability of our customers, to manage inventory;
	•	our ability to retain, recruit and hire key executives, technical personnel and other employees in the positions and numbers, with the experience and capabilities, and at the compensation levels that we need to implement our business and product plans;
	•	our ability to specify, develop or acquire, complete, introduce, market and transition to volume production new products and technologies in a cost-effective and timely manner;
	•	the rate at which our present and future customers and end users adopt our technologies and products in our target markets;
	•	the availability and pricing of third party semiconductor foundry, assembly and test capacity and raw materials;
	•	our ability to timely and accurately predict market requirements and evolving industry standards and to identify and capitalize upon opportunities in new markets;
	•	competitive pressures and other factors such as the qualification, availability and pricing of competing products and technologies and the resulting effects on sales and pricing of our products;
	•	changes in our product or customer mix;
	•	the volume of our product sales and pricing concessions on volume sales; and
	•	the effects of public health emergencies, natural disasters, terrorist activities, international conflicts and other events beyond our control.

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	•	settlement costs;
	•	impairment of goodwill and other intangible assets;
	•	income tax benefits from adjustments to tax reserves of foreign subsidiaries;
	•	gain (loss) on strategic investments;
	•	stock-option exchange expense; and
	•	restructuring costs.costs or reversals thereof.

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		we do not recognize revenue until all customer acceptance requirements have been met, when applicable. These criteria are usually met at the time of product shipment. However, aA portion of our sales are made through distributors under agreements allowing for pricing credits and/or rights of return. Product revenue on sales made through these distributors is not recognized until the distributors ship the product to their customers. Customer purchase orders and/or contracts are generally used to determine the existence of an arrangement. Shipping documents and the completion of any customer acceptance requirements, when applicable, are used to verify product delivery or that services have been rendered. We assess whether a price is fixed or determinable based upon the payment terms associated with the transaction and whether the sales price is subject to refund or adjustment. We assess the collectibility of our accounts receivable based primarily upon the creditworthiness of the customer as determined by credit checks and analysis, as well as the customer’s payment history.
	•	Sales Returns and Allowance for Doubtful Accounts. We record reductions to revenue for estimated product returns and pricing adjustments, such as competitive pricing programs and rebates, in the same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns, analysis of credit memo data, specific criteria included in rebate agreements, and other factors known at the time. Additional reductions to revenue would result if actual product returns or pricing adjustments exceed our estimates. We also maintain an allowance for doubtful accounts for estimated losses resulting from the inability of customers to make required payments. If the financial condition of any of our customers waswere to deteriorate, resulting in an impairment of its ability to make payments, additional allowances could be required.
	•	Inventory and Warranty Reserves. We write down ourestablish inventory reserves for estimated obsolescence or unmarketable inventory in an amount equal to the difference between the cost of inventory and its estimated realizable value based upon assumptions about future demand and market conditions. If actual demand and market conditions are less favorable than those projected by management, additional inventory write-downsreserves could be required. Our products typically carry a one to three year warranty. We establish reserves for estimated product warranty costs at the time revenue is recognized. Although we engage in extensive product quality programs and processes, our warranty obligation ishas been and may in the future be affected by product failure rates, use of materialsproduct recalls, repair or field replacement costs and service deliveryadditional development costs incurred in correcting any product failure.failure, as well as possible claims for consequential costs. Should actual product failure rates, use of materials or service delivery costs differ from our estimates, additional warranty reserves could be required. In that event, our gross profit and gross margins would be reduced.
	•	Stock-Based Compensation Expense for 2006 and Thereafter. Effective January 1, 2006 we adopted SFAS No. 123 (revised 2004),Share-Based Payment, or SFAS 123R. SFAS 123R requires all share-based payments, including grants of stock options, restricted stock units and employee stock purchase rights, to be recognized in our financial statements based on their respective grant date fair values. Under this standard, the fair value of each employee stock option and employee stock purchase right is estimated on the date of grant using an option pricing model that meets certain requirements. We currently use the Black-Scholes option pricing model to estimate the fair value of ourshare-based payments. TheBlack-Scholes model meets the requirements of SFAS 123R but the fair values generated by the model may not be indicative of the actual fair values of our stock-based awards as it does not consider certain factors important to stock-based awards, such as continued employment and periodic vesting requirements and limited transferability. The determination of the fair value of share-based payment awards utilizing the Black-Scholes model is affected by our stock price and a number of assumptions, including expected volatility, expected life, risk-free interest rate and expected dividends. We use the implied volatility for traded options on our stock as the expected volatility assumption required which could reduce gross margins.in the Black-Scholes model. Our selection of the implied volatility approach is based on the availability of data regarding actively traded options on our stock as we believe that implied volatility is more representative than historical volatility. The expected life of the stock options is based on historical and other economic data trended into the future. The risk-free interest rate assumption is based on observed interest rates appropriate for the terms of our stock options and stock purchase rights. The dividend yield assumption is based on our history and expectation of dividend payouts. The fair value of our restricted stock units is based on the

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		fair market value of our Class A common stock on the date of grant. Stock-based compensation expense recognized in our financial statements in 2006 and thereafter is based on awards that are ultimately expected to vest. The amount of stock-based compensation expense in 2006 and thereafter will be reduced for estimated forfeitures based on historical experience. Forfeitures are required to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. We will evaluate the assumptions used to value stock awards on a quarterly basis. If factors change and we employ different assumptions, stock-based compensation expense may differ significantly from what we have recorded in the past. If there are any modifications or cancellations of the underlying unvested securities, we may be required to accelerate, increase or cancel any remaining unearned stock-based compensation expense. To the extent that we grant additional equity securities to employees or we assume unvested securities in connection with any acquisitions, our stock-based compensation expense will be increased by the additional unearned compensation resulting from those additional grants or acquisitions. Had we adopted SFAS 123R in prior periods, the magnitude of the impact of that standard on our results of operations would have approximated the impact of SFAS 123 assuming the application of the Black-Scholes option pricing model as described in the disclosure of pro forma net income (loss) and pro forma net income (loss) per share in Note 1 of our Notes to Consolidated Financial Statements.
	•	Goodwill and Purchased Intangible Assets. Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the net tangible and intangible assets acquired. The amounts and useful lives assigned to other intangible assets acquired, other than goodwill, impact the amount and timing of future amortization, and the amount assigned to in-process research and development is expensed immediately. The value of our intangible assets, including goodwill, could be impacted by future adverse changes such as: (i) any future declines in our operating results, (ii) a decline in the valuation of technology company stocks, including the valuation of our common stock, (iii) another significant slowdown in the worldwide economy or the semiconductor industry or (iv) any failure to meet the performance projections included in our forecasts of future operating results. We evaluate these assets, including purchased intangible assets deemed to have indefinite lives, on an annual basis in the fourth quarter or more frequently if we believe indicators of impairment exist. In the process of our annual impairment review, we primarily use the income approach methodology of valuation that includes the discounted cash flow method as well as other generally accepted valuation methodologies to determine the fair value of our intangible assets. Significant management judgment is required in the forecasts of future operating results that are used in the discounted cash flow method of valuation. The estimates we have

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		used are consistent with the plans and estimates that we use to manage our business. It is possible, however, that the plans and estimates used may be incorrect. If our actual results, or the plans and estimates used in future impairment analyses, are lower than the original estimates used to assess the recoverability of these assets, we could incur additional impairment charges.
	•	Deferred Taxes and Tax Contingencies. We utilize the liability method of accounting for income taxes. We record a valuation allowance to reduce our deferred tax assets to the amount that we believe is more likely than not to be realized. In assessing the need for a valuation allowance, we consider all positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies, and recent financial performance. Forming a conclusion that a valuation allowance is not required is difficult when there is negative evidence such as cumulative losses in recent years. As a result of our cumulative losses in the U.S. and certain foreign jurisdictions and the full utilization of our loss carrybacks,carryback opportunities, we have concluded that a full valuation allowance against our net deferred tax assets was appropriate.is appropriate in such jurisdictions. In certain other foreign jurisdictions where we do not have cumulative losses, we record valuation allowances to reduce our net deferred tax assets to the amount we believe is more likely than not to be realized. In the future, if we realize a deferred tax asset that currently carries a valuation allowance, we willmay record a reduction to income tax expense in the period of such realization. We record estimated income tax liabilities to the extent the contingenciesthey are probable and can be reasonably estimated. HoweverAs a multinational corporation, we are subject to taxation in many jurisdictions, and the calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in various taxing jurisdictions. If we ultimately determine that the payment of these liabilities will be unnecessary, we reverse the liability and recognize a tax benefit during the period in

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		which we determine the liability no longer applies. Conversely, we record additional tax charges in a period in which we determine that a recorded tax liability is less than we expect the ultimate assessment to be. The application of tax laws and regulations is subject to legal and factual interpretation, judgment and uncertainty. Tax laws themselves are subject to change as a result of changes in fiscal policy, changes in legislation, evolution of regulations and court rulings. Therefore, the actual liability in any such tax contingenciesfor U.S. or foreign taxes may be materially different from our estimates, which could result in the need to record additional tax liabilities or potentially to reverse previously recorded tax liabilities.
	•	Litigation and Settlement Costs. From time to time, we are involved in disputes, litigation and other legal actions.proceedings. We are aggressively defending our current litigationprosecute and defend these matters including our pending securities class action lawsuit.aggressively. However, there are many uncertainties associated with any litigation, and we cannot assure you that these actions or other third party claims against us will be resolved without costly litigation and/or substantial settlement charges. In addition the resolution of any future intellectual property litigation may require us to make royalty payments,pay damages for past infringement or one-time license fees or running royalties, which could adversely impact gross profit and gross margins in future periods.periods, or could prevent us from manufacturing or selling some of our products or limit or restrict the type of work that employees involved in such litigation may perform for Broadcom. If any of those events were to occur, our business, financial condition and results of operations could be materially and adversely affected. We record a charge equal to at least the minimum estimated liability for a loss contingency when both of the following conditions are met: (i) information available prior to issuance of the financial statements indicates that it is probable that an asset had been impaired or a liability had been incurred at the date of the financial statements and (ii) the range of loss can be reasonably estimated. However, the actual liability in any such litigation may be materially different from our estimates, which could result in the need to record additional costs.

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