Via Bruce Schneier, Tech Republic tells the story of the women who worked at Bletchley Park during World War II:
Because [Alan] Turing's individual achievements were so momentous, it's sometimes forgotten that more than 10,000 other people worked at the Government Code and Cypher School, of whom more than two-thirds were female. These servicewomen played a pivotal role in an operation that decrypted millions of German messages and which is credited with significantly shortening the war.
The code-breaking operation was spread over teams working in various huts around the manor house at Bletchley, with the bombe machines situated in outstations nearby. There were about 8,000 people involved in the code-breaking—what was known as the factory—and 4,000 support staff. Each team generally knew no more than was necessary about what the other groups were doing.
Teams worked in different huts on breaking the Enigma codes, focusing on the army and air-force ciphers in one and the tougher naval encryption in another. Unscrambled messages were then sent on to linguists for translation and officials who would decide how the information should be used and, more importantly, whether it could be used without revealing that the Allies had cracked Enigma.
This history is hinted at, however minimally, by Kiera Knightly's character in The Imitation Game.