A broadcast network is a system that distributes television or radio programs to a wide audience. These networks use various transmission methods, such as antennas and satellites, to send signals to local stations, which then air the content to viewers or listeners. Major broadcast networks include ABC, NBC, and CBS. Broadcast networks typically produce their own shows or acquire content from other producers. They rely on advertising revenue to fund their operations, making them accessible to the public without subscription fees. This model allows a diverse range of programming, including news, entertainment, and sports, to reach millions of households.