October 7, 2013 Jeffery Stein
In November 1943, an electrical engineer working in the telecommunications department of Britain's General Post Office named Tommy Flowers designed and built the world’s first programmable computer. Named "Colossus," the thermionic tube-based programmable computer successfully broke the supposedly unbreakable Lorenz cipher used by Hitler and the German High Command during the Second World War. Afterward, Flowers had a long, successful career which included the development of the first all-electronic telephone exchange.