Creative Commons License Spectrum

In this image, BY means that the license requires that the content creator be attributed whenever the creative work is shared. SA (share-alike) means that the license requires that any derivatives of the original work be given the same license as the original work. NC (no-commercial) means that the license restricts the work from being used for commercial purposes. ND (no-derivative) means that the license restricts other individuals from modifying the original work.