| Abbreviation | Definition |
|---|---|
| APNC | Association professionnelle en nutrition des cultures |
| APNI | Association for Post Natal Illness |
| APNI | Association Pointe Noire Industrielle |
| APNR | Association of Private Nature Reserves |
| APNS | Association of Private Nursing Services |
| APO | Association for Professional Observers |
| APOA | Applewood Property Owners Association |
| APOA | Avon Property Owners Association |
| APOG | Association for the Preservation of Geneseo |
| APOL | Association of Professional Orchestra Leaders |
| APOP | Association for Pet Obesity Prevention |
| APOP | Association of Pet Obesity Prevention |
| APP | Association of Paddlesurf Professionals |
| APPA | Arkansas Professional Photographers Association |
| APPA | Asia Pacific Pediatric Association |
| APPA | Asia Pacific Publishers Association |
| APPA | Association of Physical Plant Administrators |
| APPA | Atlanta Post Polio Association |
| APPAP | Association of Postgraduate Physician Assistant Programs |
| APPB | Association des Ports de Plaisance de Bretagne |