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1945 — University of Pennsylvania
The Electronic Numerical Integrator and Computer was the first general-purpose electronic computer. Filling a 50x30 foot room, it weighed 30 tons and consumed 150 kilowatts of power.
It contained 17,468 vacuum tubes, 7,200 diodes, 1,500 relays, 70,000 resistors, and 10,000 capacitors. Programming required physically rewiring patch cables between function units.
Its first task: calculating artillery trajectory tables for the U.S. Army Ballistic Research Laboratory.