A brief history of cryptography from Caesar to Bletchley Park / Simon Singh
How it began : Bletchley Park goes to war / Michael Smith
The German Tunny machine / Jack Copeland
Colossus, codebreaking, and the digital age / Stephen Budiansky
Machine against machine / Jack Copeland
D-Day at Bletchley Park / Thomas H. Flowers
Intercept! / Jack Copeland
Colossus / Thomas H. Flowers
Colossus and the rise of the modern computer / Jack Copeland
The PC user's guide to Colossus / Benjamin Wells
Of men and machines / Brian Randell
The Colossus rebuild / Tony Sale
Mr. Newman's section / Jack Copeland, with Catherine Caughey ... [et al.]
Max Newman : mathematician, codebreaker, and computer pioneer / William Newman
Living with Fish : breaking Tunny in the Newmanry and the Testery / Peter Hilton
From Hut 8 to the Newmanry / Jack Good
Codebreaking and Colossus / Donald Michie
Major Tester's section / Jerry Roberts
Setter and breaker / Roy Jenkins
An ATS girl in the Testery / Helen Currie
The Testery and the breaking of Fish / Peter Edgerley
Dollis Hill at war / Jack Copeland, with David Bolam ... [et al.]
The British Tunny machine / Gil Hayward
How Colossus was built and operated : one of its engineers reveals its secrets / Harry Fensom
Bletchley Park's Sturgeon : the Fish that laid no eggs / Frode Weierud
German teleprinter traffic and Swedish wartime intelligence / Craig McKay.