Find general information about copyright, link to tools to help you determine if a use is fair or whether material is under copyright, learn how to research rights holders, and use electronic public domain materials.
CC BY = Attribution only (most open)
CC BY-SA = Attribution plus share derivatives alike
CC BY-ND = Attribution no derivatives allowed
CC BY-NC = Attribution only restricted to non-commercial use
CC BY-NC-SA = Attribution only restricted to non-commercial use that is shared openly
CC BY-NC-ND = Attribution only or non-commercial but no derivaties
See Creative Commons website for more information.