OAU
| Acronym | Definition |
|---|---|
| OAU | Organization of African Unity |
| OAU | Obafemi Awolowo University (Nigeria) |
| OAU | Organization for African Unity (common, but incorrect) |
| OAU | Observatorios Ambientales Urbanos (Colombia) |
| OAU | Organisation de l'Unité Africaine (French: Organization of African Unity) |
| OAU | Oxford Archaeological Unit (UK) |