The Uncalculated History of Mechanical Calculators. | Nota Bene: Eugene Kaspersky's Official Blog
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:max_bytes(150000):strip_icc()/blaise-pascal-calculating-machine-515214884-5c81fc9b46e0fb0001431954.jpg "Biography of Blaise Pascal, Inventor of the Calculator")
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National Museum of American History
The History Of The Calculator: When was the Calculator First Invented?
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