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; UTC Climate; Controls and Security; Pratt and Whitney; UTC Aerospace Systems; and Other. The Otis segment designs, manufactures, and markets elevators, escalators, moving walkways, and service. The UTC Climate, Controls and Security segment provides heating, ventilating, air conditioning, and refrigeration solutions. The Pratt and Whitney segment offers aircraft engines for the commercial, military, business jet, and general aviation markets. The UTC Aerospace Systems segment comprises aerospace products and aftermarket services for diversified industries worldwide. The Other segment involves other activities. The company was founded in 1934 and is headquartered in Farmington, CT.