The rebuilt Colossus codebreaker in action 
Published: 27 Mar 2008 12:57 GMT
Bletchley Park was the secret home to Britain's top codebreakers during World War II.
The base is now home to the fledgling National Museum of Computing, which features a rebuild of the world's first electronic codebreaking computer, Colossus.
The man who rebuilt Colossus, computer expert and former spy Tony Sale, here demonstrates how the machine works.
Credit: Video: The Colossus WWII codebreaking machine from silicon.com






