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Calculator Collection

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Calculator Collection: PSCI2A-00111

PSCI2A-00111
Calculator of Blaise Pascal, a mechanical device for adding and subtracting, 1600s. Hand-colored woodcut of an illustration

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Calculator Collection: NATL2A-00029

NATL2A-00029
Inca teacher giving lessons in counting using the quipu. Hand-colored woodcut of a 19th-century illustration

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