1940's

Alan Turing proposes the Automatic Computing Engine, or ACE
EDSAC runs its first program
EDVAC is delivered to the Ballistics Research Laboratory
ENIAC is announced
First computer "bug" is found
Harvard Mark I becomes operational
Hermann Hauser Born
IBM builds the Selective Sequence Electronic Calculator
IBM files a patent for the Harvard Mark I
Invention of the transistor
J Lyons executives report on the potential of computers to automate clerical work
Jay Forrester records idea for core memory
Konrad Zuse builds the Z2
Konrad Zuse builds the Z3
Professor Bill Phillips unveils MONIAC at the LSE
The Atanasoff-Berry Computer is completed
The Colossus Mark 1 computer is delivered to Bletchley Park
The first computing journal is published
The Manchester Baby, the world's first stored program computer, runs its first program
The Williams-Kilburn tube, the first RAM, is patented
Vannevar Bush publishes his influential essay
Wang filed a patent for a magnetic ferrite core memory
Work begins on ENIAC
Zuse sells the first Z4 computer

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