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 (19 h 16 m, 26 nov 1860 año – 14 h 5 m, 21 mar 1942 año)
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19 h 16 m, 26 nov 1860 año
14 h 5 m, 21 mar 1942 año
~ 81 years