Copyleft Glossary

Browse 8 copyleft terms defined in plain English, from the cultural dictionary of computing.

8 Copyleft Terms

Affero GPL: A copyleft free software license, commonly referring to the GNU Affero General Public License, that extends source-sharing obligations to software provided...
AGPL: The GNU Affero General Public License, a copyleft license that extends source-sharing obligations to software used over a network.
GNU General Public License: A family of strong copyleft licenses, commonly called the GPL, requiring that distributed derivative works also provide source code under the same license...
GPL: GNU General Public License — a copyleft license that requires any derivative work to also be released under the GPL. The 'viral' license: if your code touches...
GPL v3: Version 3 of the GNU General Public License, which updated GPL terms to address issues such as patent retaliation, anti-circumvention, and device lockdown...
LGPL: The GNU Lesser General Public License, a copyleft license designed mainly for libraries so they can be linked by proprietary software under certain conditions...
Mozilla Public License: A weak copyleft license, commonly abbreviated MPL, that requires modified files to remain under the MPL while allowing larger combined works to include code...
Server Side Public License: A license designed to require service providers to release the code for the broader service stack if they offer the licensed software as a service.