Uncover the secrets of Colossus, the world's first fully-functioning electronic digital computer, used at Bletchley Park during World War II to crack enemy codes. This comprehensive history brings to light previously classified information and features personal accounts from those who worked with the machine, including the architect, Thomas Flowers. Explore the workings of Colossus, its invaluable role in wartime code-breaking, and its lasting impact on computing technology. With an introductory essay by Simon Singh on cryptography and code-breaking, this book offers a fascinating glimpse into a pivotal moment in history. Key Features: * Reveals the secrets of Bletchley Park's code-breaking computers. * Features personal accounts and previously classified wartime material. * Includes contributions from the computer's architect, Thomas Flowers. * Provides context on cryptography, WWII, and the legacy of Colossus. * Opens with an essay by acclaimed writer Simon Singh. Product Summary: History book on Colossus, the world's first electronic digital computer, used at Bletchley Park during WWII. Authored by B. Jack Copeland, featuring personal accounts and historical insights. Includes 480 pages and is in English. ISBN: 9780199578146.