"A handwritten notebook by Alan Turing, the British mathematician credited with breaking German codes during World War II, sold for more than $1 million at auction Monday in New York. It is the first time a manuscript by Turing, a pioneer in computer science, has come to public market, according to Bonhams."

"Bonhams says it is currently unable to reveal the identity of the buyer."

"The 56-page manuscript, with the original cloth-backed covers, details complex mathematical and computer science notations Turing made while at Bletchley Park, the British government's code-breaking site. It dates to 1942, when Turing and other cryptologists worked to break the Enigma code used by Nazi Germany's military."