United Technologies Corporation provides technology products and services to the building systems and aerospace industries worldwide. The companyÂ’s Otis segment designs, manufactures, sells, and installs passenger and freight elevators, escalators, and moving walkways, as well as provides maintenance and repair services. Its Carrier segment offers heating, ventilating, air conditioning, and refrigeration systems, controls, services, and energy-efficient products for residential, commercial, industrial, and transportation applications. The companyÂ’s UTC Fire and Security segment provides electronic security products comprising intruder alarms, and access control and video surveillance systems; fire safety products, such as specialty hazard detection and fixed suppression products, fire extinguishers, fire detection and life safety systems, and other firefighting equipment; systems integration, video surveillance, installation, maintenance, and inspection services; and monitoring, response, and security personnel services. Its Pratt and Whitney segment supplies aircraft engines for the commercial, military, business jet, and general aviation markets; industrial gas turbines; geo thermal power systems; and space propulsion systems, as well as provides fleet management, maintenance, repair, and overhaul services. The companyÂ’s Hamilton Sundstrand segment supplies aerospace products, such as power generation, management and distribution, flight control, engine control, environmental control, auxiliary power units, and propeller systems; and industrial products, including air compressors, metering pumps, and fluid handling equipment under the Sullair, Sundyne, and Milton Roy names. Its Sikorsky segment manufactures military and commercial helicopters, as well as offers aftermarket helicopter and aircraft parts and services. United Technologies Corporation was founded in 1934 and is based in Hartford, Connecticut.

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