HISTORY OF COMPUTING.
(ALMOST) EVERYTHING YOU NEED TO KNOW ABOUT COMPUTING
During the Turing worked for the (GC&CS) at , Britain's centre. For a time he led , the section responsible for German. He devised a number of techniques for breaking German
including improvements to the pre-war Polish method and a machine that could find settings for the . Turing played a pivotal role in cracking intercepted coded messages that enabled the Allies to defeat the Nazis in many crucial engagements, including the ; it has been estimated that this work shortened the war in Europe by as many as two to four years.