ENIAC

Another computer development spurred by the
war was the Electronic Numerical Integrator and Computer (ENIAC), produced by a
partnership between the U.S. government and the University of Pennsylvania.
Consisting of 18,000 vacuum tubes, 70,000 resistors and 5 million soldered
joints, the computer was such a massive piece of machinery that it consumed 160
kilowatts of electrical power, enough energy to dim the lights in an entire
section of Philadelphia.
Developed by John Presper Eckert (1919-1995) and John W. Mauchly (1907-1980), ENIAC, unlike the Colossus and Mark
I, was a general-purpose computer that computed at speeds 1,000 times faster
than Mark I.