Compagnie Électro-Mécanique (CEM) was a French electrical engineering manufacturer based in Paris, Le Havre, Lyon, Le Bourget, Nancy, Dijon.
It was a subsidiary company of Brown, Boveri & Cie.
The company produced DC motors, AC motors, generators, turbines, transformers and railway locomotives.
Examples of railway locomotives included SNCF Class C 61000 and SNCF Class CC 65500.
This French railway-related article is a stub.