Pratt & Whitney Company (Pratt & Whitney), a subsidiary of United Technologies Corporation, designs, manufactures and services aircraft engines, and auxiliary power units. It offers products such as commercial engines, military engines, small and medium engines, ground power units, airborne auxiliary power units, and small expendable and recoverable turbojet propulsion systems. It also offers engine overhaul services, part and accessory repair, and maintenance of military engines, commercial engines, and auxiliary power units. Pratt & Whitney offers its products to aircraft manufacturers, aircraft leasing companies, airlines and other aircraft operators, and the US and foreign governments. Pratt & Whitney is headquartered in Connecticut, the US.