Computer History: ENIAC Computer History, an educational film: The First Large Scale, Programmable, General Purpose Electronic Digital Computer ~ ENIAC - original 1946 announcement film, restored & new narration. ENIAC, "Electronic Numerical Integrator and Computer", was designed by J. Presper Eckert and Dr. John Mauchly. ENIAC used 18,000 vacuum tubes. This rare film shows the ENIAC in operation in February 1946, when it was first announced to the public. Features the designers Dr. John Mauchly and J. Presper Eckert, and the U.S. Army liaison Herman Goldstine. Film shows many of the women in the ENIAC computing environment, as programmers, analysts and operators, configuring ENIAC for computational problem solving.