What Happened on June 22nd

Konrad Zuse was born in Germany. An early computer pioneer, Zuse in the 1940s began work on Plankalkul (plan Calculus), the first algorithmic programming language. Seven years earlier, Zuse developed and built the world's first binary digital computing device, the Z1. He completed the first fully functional program-controlled (by a punched paper tape) electromechanical digital computer, the Z3, in 1941. Only the Z4 -- the most sophisticated of his creations -- survived World War II.