GNU Operating System Supported by the Free Software Foundation ABOUT GNU PHILOSOPHY LICENSES EDUCATION SOFTWARE DISTROS Philosophy Essays & articles About free software Principles What is Free Software? "Free software" means software that respects users' freedom and community. Roughly; it means that the users have the freedom to run, cOPY, distribute, study change and improve the software: Thus; "free software matter of liberty; not price To understand the concept; you should think of "free as in speech; not as in "free beer: We sometimes call it "libre software;, borrowing the French or Spanish word for "free" as in freedom; to show we do not mean the software is gratis. You may have paid money t0 get copies of free program;, Or You may have obtained copies at no charge_ But regardless of how you got Your copies, you always have the freedom to copy and change the software, even to sell copies_ We campaign for these freedoms because everyone deserves them_ With these freedoms, the users (both individually and collectively) control the program and what it does for them. When users dont control the program, we call it a "nonfree" O proprietary" program: The nonfree program controls the users, and the developer controls the program; this makes the program an instrument of unjust power. source" is something different: it has very different philosophy based on different values_ Its practical definition is different too_ but nearly all source programs are in fact free We explain the difference in Why "Open Source misses the point of Free Software The Free Software Definition The four essential freedoms Free software can be commercial Clarifying the Boundary Between Free and Nonfree The freedom to run the program as You wish The freedom to study the source code and make changes The freedom to redistribute if you wish: basic requirements Copyleft Rules about packaging and distribution details Export regulations Legal considerations Contract-based licenses The Free Software Definition in Practice How we interpret these criteria Get help with free licenses "free "Open open