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Blaise Pascal invented a mechanical calculator dubbed Pascaline
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Gottfried Leibniz invented the Leibniz Wheel
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The creation of the first machine ever that used the idea of storage and programming
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Charles Babbage invented the Difference Engine
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The invention of the tabulating machine
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Mark I was a huge electromechanical protocomputer that was built by Howard Aiken. The Mark I was followed by three more advanced computing machines (Mark II-IV).
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The Z1 (a general-purpose mechanical computer) was built by Konrad Zuse
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The creation of ABC (Atanasoff Berry Computer) by Jhon V. Atanasoff and his assistant Cliffort Berry
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Tommy Flowers and his team invented the Colossus, the world’s first programmable electronic digital computer
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The first general-purpose, totally electronic computer (ENIAC) was made by John Mauchly and J. Presper Eckert
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The first computer to be designed based on von Neumann’s concept was the EDVAC