Colossus: Bletchley Park's Last Secret

This is the last untold story of Bletchley Park. Using declassified information, Paul Gannon gives us a gripping account of the invention of the world's first true computer, Colossus. Uncover the secrets of Bletchley Park's code-breaking computers. In 1940, almost a year after the outbreak of the Second World war, Allied radio operators at an interception station in South London began...