English abbreviations from oai to oar
- OAI (Bagram Airfield)
- OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting)
- OAJ (Albert J. Ellis Airport)
- OAJCG (Operation Alliance Joint Control Group)
- OAK (Oakland International Airport)
- OAKOC (Observation and Fields of fire, Avenues of approach, Key terrain, Obstacles, Cover)
- OAKS (Outdoor Awareness Knowledge And Science)
- OAL (Open Audio License)
- OAM (Oamaru Airport)
- OAMC (Ohio Agricultural and Mechanical College)
- OAMP (Office of Acquisition Management and Policy)
- OANG (Oregon Air National Guard)
- OAO ((observatory) Okayama Astrophysical Observatory, in Japan)
- 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)