HBO 10

When Time Inc. merged with Warner Communications in 1989, HBO became part of Time Warner (which as of 2011, continues to serve as the parent company of the network). Coincidentally, Warner Communications had created rival The Movie Channel (now owned by CBS Corporation) in the late 1970s before Viacom, which purchased a 50% stake in The Movie Channel in 1983, bought Warner's remaining half-ownership of that network in 1985.