Recent History
TOPS has grown very out of date in recent decades. It is a text-terminal, mainframe-driven system which is not very user-friendly, cryptic, hard to use and prone to operator error because of its cryptic displays and command set. In addition, it is written in its own programming language, TOPSTRAN (not strictly speaking a separate language but a set of IBM Assembler macros), and it is increasingly hard to find and train developers to maintain it. The division of British Rail and privatisation has also hurt TOPS, because it was never really designed for that; some Train Operating Companies do not keep information as up to date as they should.
Attempts have been made to 'skin' the system with a more user-friendly interface, called TOPS 2000; in addition, there are other parallel systems now, such as TRUST and Genius, but none has yet supplanted the TOPS system.
Read more about this topic: TOPS
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