Innovator and computer pioneer, Konrad Zuse was born in Germany on this TECHDAY in history. In the 1940s, he began work on Plan Calculus, which is an algorithmic programming language. Zuse was the one to develop and build the world’s first binary digital computer: The Z1. By 1941, he had completed the first fully functional program-controlled (by a punched paper tape) electromechanical digital computer, the Z3. Only the Z4, a machine more sophisticated than his other creations, survived World War II.