History of Computers By Mrs Walters Jan 1, 1936 Z1 The First programmable computer Period: Jan 1, 1936 to Dec 31, 2011 History of Computer Aug 7, 1944 Harvard Mark I Computer The computer is especially for the U.S. Navy Bureau of Ships in May. Jan 1, 1946 ENIAC 1 Computer It was designed to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory Jan 1, 1947 The Transistor Without it, we couldn’t use radios, calculators, and computers, among other things. Jun 21, 1948 Manchester Baby Computer & The Williams Tube Because of this invention, Scientists can research on cathode-ray tubes serving as computer data storage since the early 1940s. Jan 1, 1951 UNIVAC Computer The first commercial computer produced in the United States! Oct 19, 1973 ABC (Atanasoff-Berry Computer) The first digital computer.