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CASIO Calculators Global - Gottfried Wilhelm Leibniz – mathematician, philosopher, and a talented technician from Germany. In 1673 he built the Step Reckoner, first calculating machine that could perform all four arithmetic
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Leibniz wheel - Wikipedia
File:Leibniz Stepped Reckoner.png - Wikimedia Commons
History of Computers and Computing, Mechanical calculators, Pioneers, Gottfried Leibniz
History of Computers and Computing, Mechanical calculators, Pioneers, Gottfried Leibniz
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File:Leibniz's drawing of his calculating machine.jpg - Wikimedia Commons
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Dropping In on Gottfried Leibniz—Stephen Wolfram Writings
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Let us Calculate!”: Leibniz, Llull, and the Computational Imagination – The Public Domain Review
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