United Nations Abbreviations and Acronyms

1. OPER
   Operations
2. OPM
   Other People'S Money
3. OPNS
   Operations
4. OPPBA
   Office of Programme Planning, Budget and Administration
5. OPPF
   Olof Palme Peace Foundation
6. OPR
   Operational Peer Review
7. OPS
   Operations
8. OSAGI
   Office of The Special Adviser of Issues and The Advancement of Women
9. OSAR
   Office Suisse D’aide Aux Refsgiés
10. OSCAL
    Office of The Special Coordinator for Africa and Lpcs
11. OSCE
    Organization for Security and Co-Operation in Europe
12. OSE
    Office Jf Special Envoy
13. OSM
    Operation Support Manual
14. OTCD
    Organizations of Turkic Cooperation and Development
15. OTH
    Other Trunk
16. OTH
    Other (on overtime forms)
17. OUN
    Organization of United Nations
18. OUO
    Official-Use Only
19. OYW
    One Year War
20. PAAS
    Project Accrual and Accountability System

Last updated: September 19, 2021 — Total entries: 1,666