United Technologies Corporation operates in the Aircraft engines and engine parts sector. United Technologies Corporation (UTC) is a provider of technology products and services to the building systems and aerospace industries worldwide. The Company's operating units include businesses with operations throughout the world. Otis, Carrier and UTC Fire and Security serve customers in the commercial and residential property industries worldwide. arrier also serves commercial, industrial, transport refrigeration and food service equipment customers. Pratt and Whitney, Hamilton Sundstrand and Sikorsky serve commercial and government customers in both the original equipment and aftermarket parts and services markets of the aerospace industry. Hamilton Sundstrand, Pratt and Whitney and UTC Fire and Security also serve customers in certain industrial markets. During the year ended December 31, 2010, its commercial and industrial sales were approximately 57% of the net sales. In September 2011, the Company sold Chubb Guarding Services Singapore Pte Ltd. In our complete report available for purchase the company is compared to: Honeywell International Incorporated, Finmeccanica SpA and Textron Inc..