Outside the world of computer science or mathematics the name of probably the most influential figure and in some sense the father of all computing technology Alan Mathison Turing is hardly known.
In late 1940 Alan Turing wrote a report describing the methods he and
his colleagues at Bletchley Park had used to break into the German
Enigma cipher systems. At Bletchley it was known as 'the Prof's Book.' A
copy of this handbook was at last released from secrecy by the American
National Security Agency in April 1996, under the title 'Turing's
Treatise on the Enigma.'