OBU
| Acronym | Definition |
|---|---|
| OBU | Oklahoma Baptist University |
| OBU | Ouachita Baptist University |
| OBU | Optical Business Unit |
| OBU | Offshore Banking Unit |
| OBU | One Big Union |
| OBU | Onboard Unit |
| OBU | Old Boys Union |
| OBU | Operational Base Unit |
| OBU | OSIS Baseline Upgrade |
| OBU | Old Baptist Union (est. 1880) |
| OBU | Outside Broadcast Unit |
| OBU | Occasional Business Use |
| OBU | Overseas Business Unit |
| OBU | OSIS Baseline Group |
| OBU | Out of Balance Unit |