Total Operations Processing System, or TOPS, is a computer system for managing the locomotives and rolling stock (railroad cars) owned by a rail system. It was originally developed by the Southern Pacific Railroad and was widely sold; it is best known in Britain for its use by British Rail and its successors. (Taken from Wikipedia . See also this alternative Wikipedia link for more information about TOPS class numbers.)
Last edited by GeoffM on 15/09/2016 at 03:01