United Technologies Corporation provides technology products and services to building systems and aerospace industries worldwide. Its Otis segment designs, manufactures, sells, and installs passenger and freight elevators, escalators, and moving walkways; modernization products to upgrade elevators and escalators; and maintenance and repair services. The company’s UTC Climate, Controls & Security segment provides heating, ventilating, air conditioning, and refrigeration solutions, such as controls for residential, commercial, industrial, and transportation applications. This segment offers electronic security products, including intruder alarms, access control systems, and video surveillance systems; and fire safety products; systems integration, video surveillance, installation, maintenance, and inspection services; and monitoring and response services. Its Pratt & Whitney segment supplies aircraft engines for commercial, military, business jet, and general aviation markets; and provides aftermarket maintenance, repair, and overhaul, as well as fleet management services. The company’s UTC Aerospace Systems segment provides electric power generation, power management, and distribution systems; air data, and flight sensing and management systems; engine control, electric, intelligence, surveillance, and reconnaissance systems; engine components; environmental control systems; fire and ice detection, and protection systems; propeller systems; cargo, actuation, and landing systems; aircraft aero structures, and lighting and seating products; space products and subsystems; and aftermarket services. United Technologies Corporation offers its services through manufacturers’ representatives, distributors, wholesalers, dealers, retail outlets, and sales representatives, as well as directly to customers. The company was founded in 1934 and is headquartered in Farmington, Connecticut.