By Gemma Simpson, 16 November 2007 14:25
Pictured with the revamped machine is Tony Sale, who led the 14-year Colossus rebuild project.
Colossus was originally designed by a group at Bletchley Park which included engineer Tommy Flowers and mathematician Max Newman.
The prototype, Colossus Mark I, arrived at Bletchley in December 1943 and was operational by February 1944.
An improved Colossus Mark II was first installed in June 1944 and was working in time for commander Eisenhower and field marshall Montgomery to be sure Hitler had swallowed the deception campaigns prior to D-Day on 6 June 1944.
There were eventually 10 working Colossus machines at Bletchley.
Photo credit: The National Museum of Computing
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1. Geoff M
Obviously no problem getting women into IT in those days!!