MI 2N (Matériel d'Interconnexion à 2 Niveaux in French, literally Double-decker Interconnection Hardware) is a type of electric multiple unit running on the French RER rail network, built by GEC Alstom and ANF for SNCF and RATP. An electric multiple unit or EMU is a Multiple unit train consisting of many carriages using Electricity as the motive power The RER ( R éseau E xpress R égional, ɛʀøɛʀ "Regional Express Network" is a Rapid transit system in France serving Alstom ( is a large French multinational conglomerate which holds interests in the power generation and Transport markets Ateliers du Nord de la France (ANF was a French locomotive manufacturer based at Blanc Misseron. SNCF ( Société Nationale des Chemins de fer Français) (French National Railway Company is a French public enterprise The Régie Autonome des Transports Parisiens ( RATP/Autonomous Operator of Parisian Transports) is the major transit operator responsible for Public transportation
Even the SNCF and RATP versions look very similar, they are in fact different, and are designated with different names in each company :