My husband, James Watson, who has died aged 76, was a computer specialist in the civil service. His career spanned the progression from room-sized mainframe computers through to laptops and the internet.
Early in his career he worked on the LEO (the first business computer) and extensively on ICL 1900s – such that he could later inform a specialist at the National Museum of Computing in Bletchley why their explanation of how one operated was not exactly correct. He looked back fondly on helping to bring in decimalisation in 1971.