Army Abbreviations and Acronyms

1. ORS
   Operation Rising Star
2. ORSA
   Operations Research/Systems Analyst
3. ORSM
   Ofi-Route Smart Mine
4. ORSMC
   Off-Route Smart Mine Clearance
5. OS
   Operating System
6. OS
   Operations Support
7. OS
   Offensive Support
8. OS
   Operations Specialist
9. OS
   Orderly Sergeant
10. OS
    Ordnance Services
11. OS
    General Staff
12. OS
    On Seb
13. OS
    Operating Stocks
14. OS
    Opportunity To Serve
15. OS
    Other Specificgtions
16. OS
    Outer Sensor
17. OS
    Overtly Similar
18. OS-JTF
    Open Systems _ Joint Task Force
19. OSA
    Overseas Contingency Operation Support Assignments
20. OSAA
    Operational Support Airlift Agency

Last updated: December 19, 2021 — Total entries: 29,691