The Z3 was a German electro-mechanical computer designed by Konrad Zuse. It was the world’s first working programmable, digital computer. It operated at a clock frequency of about 4–5 Hz. Program code was stored on punched film. Initial values were entered manually. Konrad Zuse is often regarded as the inventor of the computer. Credit: Wikipedia
After leaving the University of Pennsylvania due to disagreements about patent ownership, J. Presper Eckert and John Mauchly – the two men who headed the ENIAC project – launched the first commercial computer company, Electronic Control Company. They begin to work on the UNIVAC (Universal Automatic Computer) for the U.S Census Bureau.