acronym from "electronic numeral integrator and computer," device built 1946 at University of Pennsylvania by John W. Mauchly Jr., J. Presper Eckert Jr., and J.G. Brainerd. It cost $400,000, used 18,000 radio tubes, and was housed in a 30-foot-by-50-foot room.[ENIAC etymology, ENIAC origin, 英语词源]