| Abbreviation | Definition |
|---|---|
| UNO | United Nations Organization |
| UNO | United Nations Orgnisations |
| UNOB | United Nations Operation in Burundi |
| UNOCA | United Nations Office for Central Africa |
| UNOCI | United Nations Operation in Côte d'Ivoire |
| UNOE | United Nations Owned Equipment |
| UNOG | United Nations Office at Geneva |
| UNOHCHR | United Nations Office of the High Commissioner for Human Rights |
| UNOMA | United Nations Office for Martian Affairs |
| UNOMIG | nited Nations Observer Mission in Georgia |
| UNOMIG | United Nations Observer Mission in Georgia |
| UNOMIL | nited Nations Observer Mission in Liberia |
| UNOMIL | United Nations Observer Mission in Liberia |
| UNOMOZ | nited Nations Operation in Mozambique |
| UNOMOZ | United Nations Operation in Mozambique |
| UNOMSIL | United Nations Mission of Observers in Sierra Leone |
| UNON | United Nations Office at Nairobi |
| UNOOSA | United Nations Office for Outer Space Affairs |
| UNOP | United Nations Office For Partnerships |
| UNOPS | The United Nations Office for Project Services |