| Abbreviation | Definition |
|---|---|
| UMR | Unaccompanied Minor Refugee |
| UN | United Nations |
| UN | United Nations |
| UN!ITRAL | United Nations Commission on International Trade Law |
| UN/CEFACT | United Nations Centre for Trade Facilitation and Electronic Business |
| UN/ISDR | United Nations Agency Secretariat of the International Strategy for Disaster Reduction |
| UN? | United Nations |
| UN?ITRAL | United Nations Commission on International Trade Law |
| UN€ | United Nations |
| UNACC | United Nations Association in Canada Calgary |
| UNAE | United Nations Arms Embargoes |
| UNAFF | United Nations Association Film Festival |
| UNAG | United Nations Association of Georgia |
| UNAIDS | Joint United Nations Programme on |
| UNAIDS | Joint United Nations Programme on HIV/ Acquired Immune Deficiency Syndrome |
| UNAIDS | Joint United Nations Programme on HIV/AIDS |
| UNAMA | United Nations Assistance Mission in Afghanistan |
| UNAMI | United Nations Assistance Mission for Iraq |
| UNAMID | United Nations African Mission In Darfur |
| UNAMID | United Nations Assistant Mission in Darfur |