Read More .. From the CC Licensing Page
"The following describes each of the six main licenses offered when you choose to publish your work with a Creative Commons license. We have listed them starting with the most accommodating license type you can choose and ending with the most restrictive license type you can choose."
Creative Commons provides free tools that let authors, scientists, artists, and educators easily mark their creative work with the freedoms they want it to carry. You can use CC to change your copyright terms from "All Rights Reserved" to "Some Rights Reserved."
Explore the Creative Commons Home Page
"Creative Commons is a nonprofit corporation dedicated to making it easier for people to share and build upon the work of others, consistent with the rules of copyright. We provide free licenses and other legal tools to mark creative work with the freedom the creator wants it to carry, so others can share, remix, use commercially, or any combination thereof."
Read about CC's very latest work in expanding and protecting the public domain, beyond CC licensing
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