| Acronym | Definition |
|---|
| AOB | All on Board |
| AOB | Annals of Botany |
| AOB | Algemene Onderwijsbond |
| AOB | Any Other Business |
| AOB | As on Board (shipping) |
| AOB | American Oriental Bioengineering (pharmaceuticals) |
| AOB | Audio Object |
| AOB | Audio Output Board |
| AOB | All on a Bitch (business motto) |
| AOB | Ace of Base (band) |
| AOB | Archdiocese of Baltimore (Catholic Church) |
| AOB | Association of Brewers |
| AOB | Ammonia Oxidizing Bacteria |
| AOB | Accessory Olfactory Bulb |
| AOB | At or Below (aviation) |
| AOB | Advanced Operations Base (US DoD) |
| AOB | Assignment of Benefits |
| AOB | Austrian Ombudsman Board (est. 1977) |
| AOB | Alcohol On Breath |
| AOB | Aviation Operations Branch (US DoD) |
| AOB | Air Order of Battle |
| AOB | Annual Operating Budget |
| AOB | Angle Of Bank |
| AOB | Astronomical Observatory, Belgrade |
| AOB | Association Ornithologique de Belgique (French: Ornithological Association of Belgium) |
| AOB | Anterior Open Bite (dentistry) |
| AOB | Arts Off Broadway (San Diego, CA) |
| AOB | Adjusted Occupied Bed |
| AOB | Appellant's Opening Brief |
| AOB | All Other Business |
| AOB | Attack on Babylon |
| AOB | Away on Business (hospitality discount program) |
| AOB | Alliance of Baptists |
| AOB | Art of Books (bookseller website) |
| AOB | Angle On the Bow |
| AOB | Average-On-Board |
| AOB | Array of Bytes (computer code) |
| AOB | Andy O'Brien (Irish soccer player) |
| AOB | Approved Operating Budget |
| AOB | Audio of Being (Matthew Good album) |
| AOB | Art of Business |
| AOB | Airfield Operations Board |
| AOB | Alternate Operating Base |
| AOB | Airfield Operations Battalion (US Army Aviation) |
| AOB | Amicale Ornithologique du Blavet (French ornithological association) |
| AOB | Air Operations Branch |
| AOB | Analog Output Board |
| AOB | Analytical Operations Branch |
| AOB | Auxiliary Order Board |
| AOB | Angle Of Bearing |
| AOB | Adiabatic Oxygen Bomb (calorimeter) |
| AOB | Alignment Outlet Box(es) |
| AOB | Alliance of Brothers (gaming guild) |
| AOB | Asymptotic Optimal Boundary |
| AOB | Alcohol on Board (healthcare) |
| AOB | Authorization of Billing (Medicare) |
| AOB | All Out Bombing (gang) |
| AOB | Agenda on Board |
| AOB | Announcer on Board (advertising) |