Rockefeller Differential analyzer a one-hundred-ton machine with 2000 vacuum tubes and 150 motors, and weighed 100 tons It was an analog computer. An analog computer carries out an analogy of a real physical process It was invented 1942 (19h 16min, nov 26, 1860 y – 14h 5min, mar 21, 1942 y)
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19h 16min, nov 26, 1860 y
14h 5min, mar 21, 1942 y
~ 81 years