the hacker's dictionary
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http://www.hackersdictionary.com/html/index.html
http://www.hackersdictionary.com/html/index.html
Recommend also the seminal TMRC dictionary for several terms absent here, plus some memorably elegant definitions:
Kludge: A crock that works.
Crock: A kludge that doesn't work.
Same again true of Peter Samson's original 1959 and 1960 editions.