Researched
Open Licences (GPL, CC)
The GNU GPL (1989) and Creative Commons licences (2002) use copyright itself to guarantee that anyone may share and reuse works.
Open in the interactive tree →Richard Stallman's 'copyleft' licence required modified software to stay free, which enabled Linux and much of today's software. Creative Commons applied the idea to text, images and data, and its licences are used by Wikipedia and open-access journals.
Prerequisites
Unlocks
- Wikipedia2001
- Open Access & Open Science2018-2026Creative Commons licences are the legal basis of most open access