Operadora Ferroviaria Sociedad del Estado Operadora Ferroviaria Sociedad del Estado Operadora Ferroviaria Sociedad del Estado (abbreviated SOFSE; trading name: Trenes Argentinos Operaciones) is an Argentine State-owned company created in 2008 to operate passenger services in Argentina. It is a subsidiary of the Ferrocarriles Argentinos holding company. Since March 2015 SOFSE has run the Buenos Aires commuter rail services Mitre, San Martín, Roca and Belgrano Sur lines previously operated by private companies. After the Railway privatisation in Argentina at the beginning of the 1990s the railway assets that had not given in concession were taken over by Ferrocarriles Argentinos before being dissolved. From 1996 to 2000
Fiat Ferroviaria Fiat Ferroviaria Fiat Ferroviaria was the rail division of FIAT of Italy. It was founded in 1880 as Società Nazionale Officine di Savigliano. Fiat Ferroviaria began building locomotives in the 1930s. It became part of FIAT in 1970. Fiat Ferroviaria acquired the rail business of SIG of Switzerland in 1995 forming the subsidiary Fiat-Sig. The company had previously owned Argentine company Materfer until 1998, which now operates as an independent company. It was taken over in 2000 by the French Alstom, which continues to produce and support many of Fiat Ferroviaria's products. During the 60s-70s Fiat Ferroviaria developed tilting technology