Copyright Basics- Fair Use - Alternatives to Copyright - Creative Commons
is a nonprofit organization working to increase the amount of creativity (cultural, educational, and scientific content) in “the commons” — the body of work that is available to the public for free and legal sharing, use, repurposing, and remixing.
View CC descriptive video "Get Creative"
about the concept of "creative commons." Copyleft - GNU license information
Copyleft is a general method for making a program (or other work) free, and requiring all modified and extended versions of the program to be free as well.