Punched-card machine by British Tabulating Machines
Bletchley Park’s work also involved industrial-scale information-handling to manage the huge number of intercepted German messages. In the 1930s commercial data-processing was the preserve of punched-card machines.
Many British Tabulating Machines (BTM) devices, branded ‘Hollerith’ after their inventor, were installed at Bletchley Park. An identical machine, displayed here, was given to the Science Museum by BTM in 1932.
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