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Pre-Computing

Punched Card Processing

Analog Computers

WWII

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J Lyons, Accounting office, c.1900
Credit: Science Museum, London

Ancient - 1940s

Devices to make calculation easier have existed for thousands of years. From the abacus to the mechanical desktop calculator, from analog bombsights to the WW II Enigma encryption machine, this section highlights some of these devices and the problems they were invented to solve.

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Computer History Museum
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