There are Six Major Licenses:
Attribution * ( CC-BY )
Attribution Share Alike ( CC-BY-SA )
Attribution No Derivatives ( CC-BY-ND )
Attribution Non Commercial ( CC-BY-NC )
Attribution Non Commercial Share Alike ( CC-BY-NC-SA )
Attribution Non Commercial No Derivatives ( CC-BY-NC-ND )
* Attribution = a concept in copyright Law requiring an Author to be credited.