A widely-used free software license that was originally created by Richard Stallman. The GPL is a copyleft license, which means that any derivative work based on GPL-licensed software must also be distributed under the same GPL license terms. Key features of the GPL include:
- Freedom to use: Users can run the software without restrictions.
- Freedom to study: With access to the source code, users can study how the software works and adapt it to their needs.
- Freedom to distribute: Users can redistribute copies of the software to others for free or a fee.
- Freedom to modify: Users can modify the software and distribute their modified versions, as long as they distribute the modified source code under the GPL.
The GPL has three main versions:
- GPLv1: The original version, released in 1989.
- GPLv2: Released in 1991, with clarifications and additional terms.
- GPLv3: Released in 2007, with provisions to address software patents, digital rights management (DRM), and other issues.
The GPL is designed to protect the rights of users and ensure that software remains free and open. It has played a significant role in the development of the open-source software movement and has influenced many other free software licenses. When using GPL-licensed software in a project, it is essential to understand the implications of the license and ensure compliance with its terms to avoid legal issues.
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