The Poles certainly got the ball rolling (see <a href="http:&#x2F;&#x2F;www.codesandciphers.org.uk&#x2F;virtualbp&#x2F;poles&#x2F;poles.htm" rel="nofollow">http:&#x2F;&#x2F;www.codesandciphers.org.uk&#x2F;virtualbp&#x2F;poles&#x2F;poles.htm</a>), but the organization at Bletchley Park took decryption and analysis of Enigma traffic to an industrial scale. By the end of war Bletchley employed around 10,000 people. See Alan Turing&#x27;s and Gordon Welchman&#x27;s biographies for more details.