| Abbreviation | Definition |
|---|---|
| APBS | Association for Positive Behavior Support |
| APCI | All Purpose Canines, Inc. |
| APCUG | Association of Personal Computer User Groups |
| APCWS | Association for the Preservation of Civil War Sites |
| APDA | American Parkinson Disease Association |
| APDA | American Parliamentary Debate Association |
| APDA | American Power Dispatchers Association |
| APDAI | American Parkinson Disease Association, Inc. |
| APDASF | American Power Dispatchers Association Scholarship Fund |
| APEC | Asia Pacific Economic Cooperation |
| APECE | Associacao Portuguesa para Estudo e Conservacao de Elasmobranquios |
| APF | American Poetry Fund |
| APF | American Porphyria Foundation |
| APFI | Alzheimer's Prevention Foundation International |
| APFI | Arnel Pineda Foundation Inc. |
| APG | Anti-Piracy Group |
| APGA | American Public Gardens Association |
| APHA | American Paint Horse Association |
| APHA | American Printing History Association |
| APHD | Asia Partnership for Human Development |