Hundreds of television channels, thousands of local and national radio stations, several dozen newspapers, a productive and profitable national cinema and a rapid growth of broadband Internet use constitute a vibrant media industry in Turkey. The majority of the TV audiences are shared among public broadcaster TRT and the network-style channels such as Kanal D, Show TV, ATV and Star TV. The broadcast media have a very high penetration as satellite dishes and cable systems are widely available. The Radio and Television Supreme Council (RTÜK) is the government body overseeing the broadcast media. By circulation, the most popular newspapers are ''Posta'', ''Hürriyet'', ''Sözcü'', ''Sabah'' and ''Habertürk''.