Evolution of the Computer, The

First Generation (1939-1954) - vacuum tube1937 - John V. Atanasoff designed the first digital electronic computer 1939 - Atanasoff and Clifford Berry demonstrate in Nov. the ABC prototype 1941 - Konrad Zuse in Germany developed in secret the Z3 1943 - In Britain, the Colossus was designed in secret at Bletchley Park to decode German