| Acronym | Definition |
|---|
| OBO | Or Best Offer (used in for sale ads) |
| OBO | On Behalf Of |
| OBO | Oboe (music scores) |
| OBO | Omo Baba Olowo (Davido album) |
| OBO | Observation (UK) |
| OBO | Open Biomedical Ontologies |
| OBO | Open Ball Operator |
| OBO | One by One |
| OBO | One By One (animal rescue) |
| OBO | One by One (competitive figure skating scoring) |
| OBO | Orange Blossom Opry (music showcase; Florida) |
| OBO | Overseas Buildings Operations (US Department of State) |
| OBO | Oil/Bulk/Ore (carrier ships description) |
| OBO | Oil Bulk Ore |
| OBO | Order Book Official |
| OBO | Orbis Biblicus et Orientalis |
| OBO | Owner Buy Out |
| OBO | off by one (arithmetic error) |
| OBO | On Basis Of |
| OBO | Over-By-Over (Cricket sport) |
| OBO | Our Best Offer |
| OBO | Obihiro, Japan - Obihiro (Airport Code) |
| OBO | Open Biological Ontology |
| OBO | Output Backoff |
| OBO | Operated By Others |
| OBO | Official Business Only |
| OBO | On Buyout (auctioning services) |
| OBO | Outdoor Box Office Ltd. |
| OBO | Office of Business Oversight |
| OBO | Orbis Biblicus et Orientalensis (German) |
| OBO | Outboard Officer |
| OBO | Obviously Beaten Opponent |
| OBO | Owned by Owner |
| OBO | One Ball Only |