books.google.com - At last - the secrets of Bletchley Park's powerful codebreaking computers. This is a history of Colossus, the world's first fully-functioning electronic digital computer. Colossus was used during the Second World War at the Government Code and Cypher School at Bletchley Park, where it played an invaluable...http://books.google.com/books/about/Colossus_The_First_Electronic_Computer.html?id=e6ocfloTkJ4C&utm_source=gb-gplus-shareColossus: The First Electronic Computer
