When I was a kid, there were just three TV channels available. I think that was the case in most markets. These three used the channels 2 through 12 - these were the VHF channels. Channel 13 and above were UHF channels. V for "very" and U for "ultra" high frequency. The local channels were separated so as not to interfere with each others. Cincinnati had 5, 9 and 12. Dayton had 2 and 7.
In those channels above 12, Cincinnati eventually had channel 48, WCET, the "educational channel" (now PBS). Dayton had one of the three major channels on 45 and had educational channels on 14 or 16.
When FOX decided to get into the TV business, Cincinnati got channel 19. Located in northern Kentucky, it went on the air in 1968. It almost went off the air in 1971 due to lack of viewership. Some ownership changes saved it. It has made it through the years. It introduced 10pm news to the city in 1993 and it went over big. They brought in a guy named Jack Atherton to be their first anchor. I found out today that he was dating Madonna. He stayed with the station for 15 years.
In case you were in the goup of modern readers of mine who never had the gift of learning the use of Roman numerals, XIX is 19.
Recently, FOX 19 has made a splash locally by nabbing important sports programming. Today, they presented the Cincinanti Reds opening day parade and game.