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Go backward to Top . Go up to Top . 1989 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. The license agreements of most software companies try to keep users at the mercy of those companies. The General Public License applies to the Free Software Foundation's software and to any other program whose authors commit to using it.