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QWho devised the Perpetual Calendar machine?
ID: #7463
Computer Generations
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#7463Q ID
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Computer GenerationsTopic
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Correct Answer: Option C
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Explanation: In 1831-1835, mathematician and engineer Giovanni Plana devised a Perpetual Calendar machine, which, through a system of pulleys and cylinders and over, could predict the perpetual calendar for every year from AD 0 (that is, 1 BC) to AD 4000, keeping track of leap years and varying day length.
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