+Richard Stallman is an American software freedom activist and programmer, best known for initiating the [GNU Project](/wiki/gnu_project). He founded the Free Software Foundation (FSF) to advocate for the ethical imperative of [Free Software](/wiki/free_software), ensuring users' rights to run, study, change, and distribute software.
+## See also
+- [Copyleft](/wiki/copyleft)
+- [Open Source](/wiki/open_source)
+- [Software Freedom](/wiki/software_freedom)
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