United Technologies Corporation (UTC) provides high technology products and services to the building systems and aerospace industries worldwide. The Company operates in six segments: Otis, Carrier, UTC Fire & Security, Pratt & Whitney, Hamilton Sundstrand and Sikorsky. Otis, Carrier and UTC Fire & Security (collectively referred to as the commercial businesses) serve customers in the commercial, government infrastructure and residential property sectors worldwide. Pratt & Whitney, Hamilton Sundstrand and Sikorsky (collectively referred to as the aerospace businesses) primarily serves commercial and government customers in both the original equipment and aftermarket parts and services markets of the aerospace industry. In February 2012, G4S plc�s subsidiary, G4S Secure Solutions (UK) Limited, acquired Chubb Emergency Response from the Company. In July 2012, it acquired Goodrich Corporation.