This document provides an overview of several major players in the music industry, including Sony Music Entertainment (SME), Universal Music Group, EMI Music, Spotify, and Napster. It discusses their business models, labels, artists, revenues, and roles within the changing music industry landscape. SME is highlighted as one of the "big four" record companies and its subsidiaries spanning production, consumption, distribution, and artists are listed. Financial figures from 2008 and 2010 are presented for SME. Brief histories and descriptions of services for the other companies are also summarized.