Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1985 , the first U.S. cable channels devoted to pay-per-view , Viewer 's Choice , Cable Video Store , and Request TV began operation within days of each other .
Simplified: In 1985 , the first U.S. cable channels to show only pay-per-view , Viewers Choice , Cable Video Store , and Request TV began operation within days of each other .