This document summarizes different Creative Commons licenses that can be applied to creative works and data to grant copyright permissions. It describes the main CC licenses including Attribution (CC BY), Attribution-ShareAlike (CC BY-SA), Attribution-NonCommercial (CC BY-NC), Attribution-NonCommercial-ShareAlike (CC BY-NC-SA), Attribution-NoDerivs (CC BY-ND), and Attribution-NonCommercial-NoDerivs (CC BY-NC-ND). It also discusses combining works with different licenses, applying licenses to software and data, and resources for finding content with CC licenses.