The Free Software Foundation is a 501 non-profit organization founded by Richard Stallman on 4 October 1985 to support the free software movement, which promotes the universal freedom to study, distribute, create, and modify computer software, with the organization's preference for software being distributed under copyleft terms, such as with its own GNU General Public License. The FSF was incorporated in Massachusetts, USA, where it is also based.From its founding until the mid-1990s, FSF's funds were mostly used to employ software developers to write free software for the GNU Project. Since the mid-1990s, the FSF's employees and volunteers have mostly worked on legal and structural issues for the free software movement and the free software community.Consistent with its goals, only free software is used on the FSF's computers.HistoryThe Free Software Foundation was founded in 1985 as a non-profit corporation supporting free software development. It continued existing GNU projects such as the sale of manuals and tapes, and employed developers of the free software system. Since then, it has continued these activities, as well as advocating for the free software movement. The FSF is also the steward of several free software licenses, meaning it publishes them and has the ability to make revisions as needed.