GNU
1. [acronym: 'GNU's Not UNIX!',
see recursive acronym] A UNIX-workalike development effort of
the Free Software Foundation headed by Richard Stallman
(
"Help stamp out software hoarding!"
Though this remains controversial (because it implicitly denies any right of designers to own, assign, and sell the results of their labors), many hackers who disagree with RMS have nevertheless cooperated to produce large amounts of high-quality software for free redistribution under the Free Software Foundation's imprimatur.
See EMACS, copyleft, General Public Virus.
2. Noted UNIX hacker John Gilmore (