Download or read book Colossus written by B. Jack Copeland and published by Oxford University Press. This book was released on 2010-03-18 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an introductory essay on cryptography and the history of code-breaking by Simon Singh, this book reveals the workings of Colossus and the extraordinary staff at Bletchley Park through personal accounts by those who lived and worked with the computer.