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LEIBNITZ CALCULATOR. /nCalculating machine invented by Gottfried Wilhelm von Leibnitz (1646-1716), capable of addition, subtraction, multiplication, division and the extraction of roots, 1673 Stock Photo - Alamy
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Stepped reckoner - Wikipedia
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History of Computers and Computing, Mechanical calculators, Pioneers, Gottfried Leibniz
Old Engraved Illustration Of Old Calculating Machine Leibniz Calculator High-Res Stock Photo - Getty Images
Gottfried Wilhelm Leibniz
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