GNU Operating System 0 ( Supported by the Free Software Foundation ABOUT GNU PHILOSOPHY LICENSES EDUCATION SOFTWARE Philosophy Essays & articles About free software Principles What is Free Software? "FFree 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" is a matter of liberty; not price: To understand the concept; YOU should think of "free as in speech; not as in 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 You may have paid money to 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 sottware_ even [0 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 don't control the program; we call it a "nonfree proprietary" program: The nonfree program controls the users; and the developer controls the program; this makes the program an instrument of unjust power: "Open source" is something different: it has very different philosophy based on different values. practical definition is different tOo, but nearly all open 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 "free "free gratis.