Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. SNCF BB 1320 -  The SNCF locomotives BB 1321 to BB 1324 were a class of 1500 V DC 4 axle electric locomotives originally built for the Chemin de Fer de Paris à Orléans in the 1920s.After incorporation into SNCF the locomotives were used for shunting duties after the late 1940s.
Mean Of Transportation