For years cable television has been a kind of genie in a TV tubea potential miracle maker for the ordinary viewer but a frightening specter to commercial broadcasters. With cable (or CATV), a viewer could have at his command as many as 40 channels offering everything from ballet and sporting events to programs for minority audiences of all kinds. For this he might pay a fee as high as $20 and then a subscription of perhaps $5 a month. Though the cable companies could not hope to compete with the networks in news coverage or expensive entertainment shows, the broadcasters have...
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