United Technologies Corporation
United Technologies (UTC) is a diversified company that provides high-technology products and services to the aerospace and building systems industries. UTC Building & Industrial Systems is the world's largest provider of building technologies. Its elevator, escalator, fire safety, security, building automation, heating, ventilation, air conditioning and refrigeration systems and services promote integrated, high-performance buildings. UTC's aerospace businesses are Sikorsky aircraft and UTC Propulsion & Aerospace Systems, which includes Pratt & Whitney aircraft engines and UTC Aerospace Systems aerospace products.