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ENIAC contained nearly 18,000 vacuum tubes and filled a 1,500-square-foot room. To program it, different accumulators had to be wired to each other.
A power-hungry beast, ENIAC ran on 170,000 watts. But contrary to rumor, the lights in Philadelphia did not dim when it ran.
Mauchly and one of ENIAC's programmers. After a disagreement with the University of Pennsylvania over patents, Mauchly and Eckert left to form the Eckert-Mauchly Computer, which was bought a few years later by Sperry Rand and later became Unisys. Although Eckert stayed on, Mauchly left and was nearly broke when he died in 1980.