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Pascal's Calculator |
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| In 1642, Blaise Pascal developed a mechanical calculator to speed arithmetic calculations for his father, a tax official. Numbers are dialed in on the metal wheels on the front of the calculator. The solutions appear in the little windows along the top. | ||||||
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| Dorling Kindersley | ||||||
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| Appears in these articles: | ||||||
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| Mathematics; Pascal, Blaise | ||||||
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