Free software is about freedom, not price. It guarantees users four essential freedoms: the freedom to run the program for any purpose, to study and modify its source code, to redistribute copies, and to distribute modified versions. This empowers individuals, schools, and governments to control their own computing rather than being controlled by proprietary vendors.
While "open source" focuses on the practical benefits of shared code development, free software is rooted in ethics and social responsibility. Open source values the methodology—transparency and collaboration—while free software defends the user's right to autonomy. Proprietary software keeps users divided and helpless; free software builds a society where technology serves everyone, not just corporate interests.
The GNU General Public License (GPL) is the cornerstone of free software licensing. Created by Richard Stallman and the Free Software Foundation, the GPL uses the legal mechanism of copyleft to ensure that anyone who redistributes a GPL-licensed program—with or without changes—must pass along the same freedoms to others. This prevents companies from taking free code and turning it proprietary, guaranteeing that software remains free for all users, now and forever.
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