Alstom SA is a French multinational rail transport systems manufacturer. It is active in the fields of passenger transportation, rail services, signalling, and locomotives, producing high-speed, suburban, regional and urban trains along with trams. The company and its name were formed by a merger between the electric engineering division of Société Alsacienne de Constructions Mécaniques and Compagnie Française Thomson-Houston in 1928. Significant acquisitions later included the Constructions Électriques de France, shipbuilder Chantiers de l'Atlantique, and parts of ACEC. Wikipedia