O-&-O Station – A local station owned and operated by a network.

Off-Air – Direct reception of TV signals broadcast over-the-air.

Off-Network – Former network programs offered to stations or cable in syndication.

One-to-a-Market Rule (Also called, Radio/Television Cross-Ownership Rules) - FCC rules permitting a party to own up to 2 TV stations (provided this is permitted under the Duopoly Rule) and any of the following radio station combinations in the same market: (1) up to 6 radio stations in any market where at least 20 independent voices (e.g., TV stations, radio stations, newspapers, and a cable system) would remain post-merger; (2) up to 4 radio stations in any market where at least 10 independent voices would remain post-merger; or (3) 1 radio station notwithstanding the number of independent voices in the market. (For more information on TV ownership rules, see Les Brown’s Encyclopedia of Television, 3rd Edition.)

One Time Only (OTO) – Broadcast of a program or commercial only once, usually in syndication.

Online Service – A company or business that provides customers with Internet access services.

Overbuild – A cable system built in an area where another cable system has established service.

Overnights – Local metered-market ratings service of Nielsen Station Index (NSI) in which household ratings and shares are provided to clients the morning following the day or evening of telecast.

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