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Liang Ling-Can invents the first fully mechanical clock
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Drawings by Leonardo da Vinci depict inventions such as flying machines, including a helicopter, the first mechanical calculator and one of the first programmable robots
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John Napier invents a system of moveable rods (Napier's Rods) based on logarithms which was able to multiply, divide and calculate square and cube roots
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Invented by Wilhelm Schickard
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Blaise Pascal invents the the "Pascaline", a mechanical adding machine
