The National Museumof Computing

TNMoC sits on the Bletchley Park estate and holds what it describes as the world's largest collection of working historic computers, following the field from the secret efforts of the 1940s through mainframes to 1980s personal computing. It is recognised as one of England's top 100 'irreplaceable places'. The Colossus Computers of 1944-1945 have been approved as an IEEE Milestone, with the plaque unveiled on 29 September 2026. Aims to open Tuesday, Thursday, Saturday and Sunday, 10:30 to 16:30 in winter.