My introduction to cable TV was in the mid-'80s when I moved back to California from Indiana. The town of Alta Loma -- an unincorporated area of Rancho Cucamonga -- was serviced by ScottCable. Their office was at 19th & Amethyst in RC. Small lineup, just over 30 channels. Only premium offered was Showtime; Disney and TMC came a little later. Couple years later it became Simmons Cable TV with a slightly expanded lineup, and Adelphia after that. It was at that point during the Adelphia bank & wire fraud scandal we ditched cable for good and went with Dish (I'm still with them today), as my business-executive father had zero tolerance for anyone involved in that kind of corporate corruption.
I do remember, because I was heavily into computers & programming at the time, ScottCable's bulletin board channel operated off of an Atari 800XL home computer. I instantly recognized the graphics from it. The software for the BB was one of the Cable Graphic Sciences (a Seattle-based company) INFO/Gen cartridge ROM packs.