Combustion Engineering (C-E) was a multi-national American-based engineering firm that developed nuclear steam supply power systems in the United States. Originally headquartered in New York City, C-E moved its corporate offices to Stamford, Connecticut, in 1973. C-E owned over three dozen other companies including Lummus Company, National Tank Company and the Morgan Door Company. The company was acquired by Asea Brown Boveri in early 1990.[1] The boiler and fossil fuel businesses were purchased by Alstom in 2000,[2] and the nuclear business was purchased by Westinghouse Electric Company also in 2000.[3]