United Technologies Corp. engages in the provision of products and services to the building systems and aerospace industries worldwide. It operates through the following business segments: Otis; Carrier; Pratt and Whitney; and Collins Aerospace Systems. The Otis segment designs, manufactures, and markets elevators, escalators, moving walkways, and service. The Carrier segment provides heating, ventilating, air conditioning, and refrigeration solutions. The Pratt and Whitney segment includes aircraft engines for the commercial, military, business jet, and general aviation markets. The Collins Aerospace Systems segment offers technologically advanced aerospace products and aftermarket service solutions for aircraft manufacturers, airlines, regional, business and general aviation markets, military, space and undersea operations. The company was founded in 1934 and is headquartered in Farmington, CT.
We may not complete the combination with Raytheon or complete the combination within the time frame we anticipate; the combined business may underperform relative to our expectations; the combination may cause our financial results to differ from our expectations or the expectations of the investment community; we may not be able to achieve anticipated cost savings or other anticipated benefits.
We are a global provider of high technology products and services to the building systems and aerospace industries. Our operations for the periods presented herein are classified into four principal business segments: Otis, Carrier, Pratt & Whitney, and Collins Aerospace Systems. Otis and Carrier are referred to as the "commercial businesses," while Pratt & Whitney and Collins Aerospace Systems are referred to as the "aerospace businesses."
The current status of significant factors affecting our business environment in 2019 is discussed below. For additional discussion, refer to the "Business Overview" section in Management's Discussion and Analysis of Financial Condition and Results of Operations in our 2018 Annual Report, which is incorporated by reference in our 2018 Form 10-K.
Our worldwide operations can be affected by industrial, economic and political factors on both a regional and global level. Our operations include original equipment manufacturing (OEM) and extensive related aftermarket parts and services in both our commercial and aerospace businesses. Our business mix also reflects the combination of shorter cycles at Carrier and in our commercial aerospace spares businesses, and longer cycles at Otis and in our aerospace OEM and aftermarket maintenance businesses. Our customers are in the public and private sectors, and our businesses reflect an extensive geographic diversification that has evolved with continued globalization.