English abbreviations from oap to oasis
- OAP (Old Age Pensioner (UK))
- OAPE (Office of Alcohol Policy and Education)
- OAPT (Officer Awaiting Pilot Training.)
- OAPTer (An officer in OAPT status. While other 2nd Lt's begin their training and leadership, OAPTers complete menial tasks in support of the mission, while they wait for their assigned training date (this is known as "casual status"). It is important for all operational bases, as OAPTers are most often supplement workforce.)
- 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)