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Two American physicists, Eccles and Jordan, invent the flip-flop circuit which will be necessary for high-speed electronic calculating.
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Teletypewriters and teleprinters come into limited use in Britain, Germany and the US
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IBM introduces the electric typewriter
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Konrad Zuse completes his Z1 calculating machine
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Zuse introduces his Z1, the first programmable calculating machine.
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Zuse completes his Z3, the first program-controlled electromechanical digital computer.
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In Britain, the Colossus computer is completed and set to work breaking German codes
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Zuse completes his Z4
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IBM builds the first hard drive. It contains fifty 24 inch disks, has a capacity of 5 MB
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BM introduces RAMAC, a memory storage device based on rotating disks.