This document summarizes key points from Chapter Nine of Schilling's book. It discusses how Fraunhofer developed the MP3 format, allowing music files to be compressed and shared over the internet. It then describes how Napster launched in 1999, enabling users to easily share MP3 files. Finally, it discusses how Apple's iTunes Store launched in 2003 with a catalog of 200,000 songs available for purchase. The document provides background on important developments in digital music distribution and the companies that helped drive this revolution.