TOPS
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 the United Kingdom for its use by British Rail.
TOPS Media
An example of converted 1938 Tube Stock on the Island Line, Isle of Wight. Under TOPS, this train and other examples of the same type are designated as British Rail Class 483.
Brush Type 2 locomotives became Class 31 under TOPS. This is the data panel from a Class 31/4; the 31/4 subclass being used for locomotives with Electric Train Heating.
