Royal Military Abbreviations and Acronyms

1. OIC
   Officer's Initial Course officers
2. OO
   Orderly Officer
3. OP
   Observation Post
4. OP
   Operational
5. OPER
   Operational
6. OPL
   Operational
7. OPNL
   Operational
8. OPS
   Operational
9. ORB
   Operations Record Book
10. ORS
    Operational Research Section
11. ORTU
    Operational & Refresher Training Unit
12. ORTU
    Operational and Refresher Training Unit
13. OS
    Observers School
14. OSC
    Officers Senior Course Officers
15. OSC
    Overseas Staff College
16. OSR&AP
    Observers School of Reconnaissance & Aerial Gunnery
17. OTSCU
    Officer Training School Conversion Unit
18. OTU
    Operational and Refresher Training Unit
19. OTW
    Operational Training Wing
20. PACT
    Pre Aircrew Training

Last updated: May 24, 2020 — Total entries: 952