Attribution

Allow others to copy, distribute, display and perform your copyrighted work but only if they give credit the way you request.

No Derivatives

Allow others to copy, distribute, display and perform only verbatim copies of your work, not derivative works based upon it.

Non-commercial 

Allow others to distribute, display and perform your work—and derivative works based upon it—but for noncommercial purposes only.

Share Alike

Allow others to distribute derivative works only under a license identical to the license that governs your work.