| Acronym | Definition |
|---|
| OAP➣Old Age Pensioner (chiefly UK) |
| OAP➣On-Air Personality |
| OAP➣Open Architecture Program |
| OAP➣Osps Administrative Processor |
| OAP➣Outdoor Access Point |
| OAP➣Outside Awareness Panel |
| OAP➣One Act Play |
| OAP➣Old Age Pension |
| OAP➣Osaka Amenity Park (Osaka, Japan) |
| OAP➣Older Adults Program (various locations) |
| OAP➣On Air Presenter (broadcasting) |
| OAP➣Omnibus Autism Proceeding (National Vaccine Injury Compensation Program) |
| OAP➣Office of Alien Property |
| OAP➣Organic Action Plan (EU) |
| OAP➣Open Access Plan (managed care) |
| OAP➣Oral Anti-Platelet (therapy) |
| OAP➣Opportunities Abroad Program (California) |
| OAP➣Offermann Architektur & Projekte (German: Offermann Architecture & Projects) |
| OAP➣Off-Axis Parabola (geometry) |
| OAP➣On Air Personnel |
| OAP➣Ownership Assistance Program (home ownership; various locations) |
| OAP➣On Air Promotion (broadcasting) |
| OAP➣Ontario Automobile Policy |
| OAP➣Old Army Platoon (gaming clan) |
| OAP➣Old Ass Person |
| OAP➣Orbiting Astronomical Observatory |
| OAP➣One Arts Plaza (Dallas, TX) |
| OAP➣Old Age Partner |
| OAP➣One-Step Approval Procedure |
| OAP➣Over-the-Air Programming (computing) |
| OAP➣l'Oreal Paris |
| OAP➣Observe, Anticipate and Plan (driving safety) |
| OAP➣Open Air Pub (Engineering Undergraduate Society; McGill University; Canada) |
| OAP➣Old Age Players (gaming group) |
| OAP➣Ontario Association of Pathologists |
| OAP➣Ocean Assessment Program (US NOAA) |
| OAP➣Observation Amphibian Plane (US Coast Guard) |
| OAP➣Offset Aimpoint |
| OAP➣Old and Putrid |
| OAP➣Orthogonal Arrays of Particles |
| OAP➣One Arm Pull-up |
| OAP➣Occupational Aptitude Patterns |
| OAP➣Old Age Person |
| OAP➣Organizational Assessment Package |
| OAP➣Oceanic Automation Program |
| OAP➣Old Age Playstationer |
| OAP➣Oficina de Atención Permanente (Guatemala) |
| OAP➣Operations Approval Panel |
| OAP➣Orbit Average Power (spacecraft electric power systems) |
| OAP➣Ordered Access Pairs |
| OAP➣Ove Arup & Partners Ltd |
| OAP➣Outline Acquisition Plan |
| OAP➣Offshore Assembly Provisions |
| OAP➣Over Age Premium (logistics/shipping) |
| OAP➣Optically Activated Pigmented (coating systems) |
| OAP➣Old American Punk |
| OAP➣On Account Payment |
| OAP➣Out at Play |