Projections to 1990 of the number of commercial UHF stations in the 100 largest U.S. television markets. Under a wide range of alternative assumptions, the number of stations will increase substantially, but many spectrum assignments may remain unused. Growth is expected even with competition from new services such as cable and pay television, video disks, and VHF drop-in stations. An appendix describes the three-equation "viable stations model" used to make the projections. Other appendixes report on largely unsuccessful attempts to model television station profits using reported financial data. 308 pp.