GNU General Public License (GPL)
The GPL is a copyleft license that ensures software remains free and open. Key principles:
GPL Requirements:
- Source code must be available
- Modifications must also be GPL licensed
- No restrictions can be added to the freedoms
- Commercial use is allowed
Copyleft vs Copyright:
- Copyright: Restricts what you can do with software
-
Copyleft: Ensures software and its derivatives remain free
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