The GNU Project is a free and open-source software, mass collaboration project, announced on 27 September 1983, by Richard Stallman. Its aim is to give computer users freedom and control in their use of their computers and computing devices, by collaboratively developing and providing software that is based on the following freedom rights: users are free to run the software, share it (copy, distribute), study it and modify it. GNU software guarantees these freedom-rights legally (via its license), and is therefore free software; the use of the word "free" always being taken to refer to freedom. It originally aimed to create a free and open-source Unix-like operating system called GNU.