Hacker, developer and software freedom activist who has changed the world with his vision of freedom for the digital age. President and founder of the Free Software Foundation, a nonprofit with a worldwide mission to promote computer user freedom and to defend the rights of all free software users.
Launched the free software movement and started the development of the GNU/Linux operating system (www.gnu.org), which is free software that everyone has the freedom to copy and redistribute, with or without changes. His operating system is used on tens of millions of computers today. Pioneered the concept of copyleft.