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NSA Releases Secret Pre-History of Computers 167

An anonymous reader writes "The National Security Agency has declassified an eye-opening pre-history of computers used for code-breaking between the 1930s and 1960s. The 344 page report, entitled It Wasn't All Magic: The Early Struggle to Automate Cryptanalysis (pdf), it is available on the Government Attic web site. Government Attic has also just posted a somewhat less declassified NSA compendium from 1993: A Collection of Writings on Traffic Analysis. (pdf)"

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Q: How many IBM CPU's does it take to execute a job? A: Four; three to hold it down, and one to rip its head off.

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