Answer: United Technologies Corporation (UTC)
United Technologies Corporation (UTC) (NYSE: UTX) is an American multinational conglomerate based in Hartford, Connecticut. It researches, develops, and manufactures high-technology products in numerous areas, including aircraft engines, helicopters, heating and cooling, fuel cells, elevators and escalators, fire and security, building systems, and industrial products, among others. UTC is also a large military contractor, producing missile systems and military helicopters, most notably the UH-60 Black Hawk helicopter. In 2005, it received over $5 billion in military contracts. The "Gold Building" at One Financial Plaza, in Downtown Hartford, is the headquarters of United Technologies.