- About Archives
- About SAA
- Careers
- Education
- Publications
- Advocacy
- Membership
Linus [Torvalds] also adopted the standard GNU licensing scheme called Copyleft. The general public license, or GPL, allows users to sell, copy, and change Copylefted programs – which can also be copyrighted – but you must pass along the same freedom to sell or copy your modifications and change them further. You must also make the source code of your modifications freely available.