| 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 |