English abbreviations from oar to oasis
- OAR (Occupational Analysis Report)
- OARS (Onsite Agent's Reference Set)
- OARSI (Osteoarthritis Research Society International)
- OAS (Organization of American States)
- OASD (Office of the Assistant Secretary of Defense)
- OASD(PA) (Office of The Assistant Secretary of Defense (Public Affairs))
- OASD(RA) (Office of the Assistant Secretary of Defense (Reserve Affairs))
- OASIS (Organization for the Advancement of Structured Information Standards)