Owned-and-operated station

In the broadcasting industry, an owned-and-operated station (frequently abbreviated as O&O) usually refers to a television or radio station that is owned by the network with which it is associated. This distinguishes such a station from an affiliate, whose ownership lies elsewhere other than the network it is linked to.

The concept of an O&O is clearly defined in the United States and Canada (and to some extent, several other countries such as the United Kingdom, Australia, Brazil, and Japan), where network-owned stations had historically been the exception rather than the rule. In such places, broadcasting licenses are generally issued on a local (rather than national) basis, and there is (or was) some sort of regulatory mechanism in place to prevent any company (including a broadcasting network) from owning stations in every market in the country. In other parts of the world, many television networks were given national broadcasting licenses at launch; as such, they have traditionally been mostly (or entirely) composed of O&Os, rendering a separate notion for such a concept redundant.

In the broadcasting industry, the term "owned-and-operated station" refers exclusively to stations that are owned by television and radio networks. On the other hand, the term affiliate only applies to stations that are not owned by networks, but instead are contracted to air programming from one of the major networks. While in fact there may be an affiliation agreement between a network and an owned-and-operated station (as suggested under "Ownership Info" on the FCC TV Query search for WABC-TV), this is not necessarily required, and may simply be a legal technicality formalizing the relationship of separate entities under the same parent company. In any event, this does not prevent a network from effectively dictating an O&O's practices outside the scope of a normal affiliation agreement; for instance, network programming is very rarely preempted by O&Os, despite individual affiliates' rights to do so.

...
Wikipedia