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 min, 26 nov 1860 ans – 14 h 5 min, 21 mars 1942 ans)