Which machine started the computer revolution? Some say the was the first computer. Others credit , which wasn't technically first but got the public and government excited about computing.
It's hard to underestimate about the influence of Colossus, however. The British-built programmable system at Bletchley Park, England, helped crack the secret codes of the Third Reich and speed up the end of World War II.
The MK 1 Colossus was built in 1943 and used 1,500 vacuum tubes to calculate. By June 1944, subsequent Colossus machines using 2,000 valves were cracking German high-command codes to pave the way for D-Day.
The British government dismantled it at the end of the war to prevent any Cold War enemy from discovering such advanced technology.
This is the nearly rebuilt Colossus. A group of enthusiasts has been working on it for nearly a decade. Completion is on track for the summer.
February 5, 2007 1:53 PM PST
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