revenues from national and local advertising sales.
5. Local public television stations transmit Public Broadcasting System programming to local viewers free of charge. These stations also create original programming in a wide variety of interest areas. These stations derive the bulk of their revenues from viewer contributions.
6. Television superstations, such as WTBS (Atlanta), WOR (New York), and WGN (Chicago), function in a way very simi lar to that of local independent television stations, with the exception that they transmit their signals via satelite, and, thus, reach a national audience. These stations reach their audiences primarily through cable television companies. These stations derive their revenues from national advertising sales 3and from cable company subscriptions where the superstation is included as a part of the basic cable service.
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