Free Software Foundation (FSF)


The Free Software Foundation (FSF) is an organization that advocates for free software, and the creator of the GNU’s Not Unix (GNU) project.

  • founded in 1985 by Richard Stallman

Philosophy

Free software is defined as the freedom to do things you want to do with the software, not the price of the software.

  • i.e. “free as in speech, not free as in beer”
  • freeware refers to software that is free of charge, but not necessarily free to do what you want with

4 Software Freedoms

FSF defines four specific software freedoms:

  • Freedom to use the software for any purpose
  • Freedom to examine the source code and modify it as you see fit
  • Freedom to redistribute the software
  • Freedom to redistribute your modified software