The Free Software Foundation (FSF), started by Richard Stallman, is an advocacy organization promoting computer users' rights to use, study, copy, modify, and redistribute
computer programs. These rights are part of what the FSF considers as the freedoms for users of computer software:

• The freedom to run the program, for any purpose (freedom 0).
• The freedom to study how the program works, and adapt it to your needs (freedom 1). Access to the source code is a precondition for this.
• The freedom to redistribute copies so you can help your neighbor (freedom 2).
• The freedom to improve the program, and release your improvements to the public, so that the whole community benefits (freedom 3). Access to the source code is a precondition for this.

John Sullivan is the Campaigns Manager at the FSF, and has been involved with the BadVista, PlayOgg and Defective by Design educational campaigns, aimed at shedding light on the restrictions imposed on consumers of technology.