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When I were a mere slip of a lad (back in the early 90s), they had just rebuilt East Croydon station. It went from a frankly run down mess of a station to a gleaming, all-glass very modern looking station. A technician was working on the (then state of the art) crt platform information displays. His tool of choice? A Commodore 64 set up on the platform connected to the overhead display via a rather long serial cable.