Liberty Media Corporation, also referred to as just Liberty Media is a public holding company that operates in the mass media industry. Liberty Media began its operations in 1991 after it spun-off from the American media cable-television group, TCI. Liberty Media Corporation has interests in a wide range of entertainment and media communications businesses. These interests are through subsidiaries such as the Atlanta National League Baseball Club Inc, TruePosition Inc and Sirius XM. The company also extends its interests through other companies such as the Live Nation, Charter Communications, Barnes & Noble, Viacom and Time Warner Inc where it has investments. Liberty Media is based in Colorado, USA.