How cable TV works...probably

Without looking it up online or elsewhere pick one of the following pieces of services and tell me how you think it works-- cable television, email, or some other mysterious system that you would like to talk about.

I believe that cable television works off of radio frequency. Buildings that have this specific kind of TV are wired with cables that transmit radio signals to the televisions that they plugged into which decodes this information and displays it in the form of TV channels.