OAO, a
three-letter acronym, may stand for:
*
Orbiting Astronomical Observatory, the name of four NASA scientific satellites
*
Open joint-stock company (russian: Открытое Aкционерное Oбщество), business incorporation in Russia, Ukraine etc.
*
Odessey and Oracle, 1968 album by The Zombies
*
Oddworld: Abe's Oddysee a platform game made by Oddworld Inhabitants released in 1997
*
Over and Out (disambiguation)
Over and Out is a combination of the Procedure words OVER and OUT.
Albums
* ''Over and Out'' (Tar album)
* ''Over and Out'' (Rick Parfitt album)
Songs
* "Over and Out", by Foo Fighters from their album ''In Your Honor''
* "Over and Out", by Pa ...
, various meanings including the usual ending of transmissions in telecommunications
*
Open-access operator
In rail transport in Europe, an open-access operator is a train operating company that takes full commercial risk, running on infrastructure owned by a third party and buying paths on a chosen route and in countries where rail services run under ...
, a British passenger rail company which does not hold a franchise
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