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A mechanical hand calculator made by Bell Punch Company Limited, a later variant of the popular German Brunsviga lever-operated calculator. Key driven... - SuperStock
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In 1939, Bell Telephone Laboratories completed this calculator, designed by researcher George Stibitz. #ThrowbackThur… | Throwback thursday, George, Complex numbers
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Bell Labs on Twitter: "Jan 8, 1940, Bell Labs engineer Dr. George Stibitz's full-scale relay calculator, the Complex Number Calculator, becomes operational. In Sep 1940, it became the 1st first computing machine
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