The document summarizes the changes made between the 2012 and 2015 versions of the CISSP Common Body of Knowledge (CBK). Specifically, it notes that the 2015 version reduced the number of domains from 10 to 8 and rearranged some content. It then provides a table mapping the new 8 domains to the relevant domains and portions of domains from the 2012 version to help students studying for the CISSP using 2012 material.