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unixronin: Galen the technomage, from Babylon 5: Crusade (Default)
Unixronin

December 2012

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Tuesday, June 1st, 2004 04:31 pm

It is reported that Colossus, the world's first electronic computer, has been rebuilt at Bletchley Park in time for the celebration of the 60th anniversary of D-Day.  Colossus, which went into service on February 1 1944 (two years ahead of ENIAC), contained 1,500 vacuum tubes and once switched on, was never switched off again until the end of the war to protect its fragile tubes.  The ten Colossus machines in service by VE Day collectively decrypted 63 million characters of German radio intercepts in the Lorenz cipher.  After the war, they were scrapped to prevent theft of their technology, and their existence was kept secret until the 1970s.