| Abbreviation | Definition |
|---|---|
| UNIS | United Nations Information Service |
| UNIS | United Nations International School |
| UNISDR | United Nation International Strategy For Disaster Reduction |
| UNISFA | United Nations Interim Security Force for Abyei |
| UNISIC | United Nations International Standard Industrial Classification |
| UNISON | United Nations International Superhero Oversight Network |
| UNIT | United Nations Intelligence Taskforce |
| UNITAID | International Drug Purchasing Facility |
| UNITAR | United Nations Institute For Training And Research |
| UNITY | United Nations In The Youth |
| UNLB | United Nations Logistics Base |
| UNLD | United Nations Literacy Decade |
| UNLK | United Nations Layout Key |
| UNLO | United Nations Liaison Office |
| UNLP | United Nations laissez passer |
| UNMA | United Nations Mission in Angola |
| UNMAS | United Nations Mine Action Service |
| UNMD | United Nations Millenium Declaration |
| UNMEE | United Nations Mission Ethiopia and Eritrea |
| UNMEE | United Nations Mission in Ethiopia and Eritrea |