Professor Brailsford rounds up the whole Colossus affair, and explains how Turing actually played a small but significant part in Bill Tutte's work.

Colossus Playlist:    • Bletchley Park (Colossus) Playlist  
Enigma Playlist:    • Alan Turing and Enigma  

What Happens When I Press a Key?:
Choosing a Password:

  / computerphile  
  / computer_phile  

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham: https://bit.ly/nottscomputer

Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com