| Abbreviation | Definition |
|---|---|
| APSSC | American Psychological Society Student Caucus |
| APT | Association for Psychological Type |
| APTOS | Asia Pacific Tele Ophthalmology Society |
| APTS | Alexandra Palace Television Society |
| APTS | Arab Professional Translators Society |
| AQA | Argentine Chemical Association |
| AQA | Asociacin Qumica Argentina |
| AQA | Asociación Química Argentina |
| AQFU | Asociacin de Qumica y Farmacia del Uruguay |
| AQFU | Asociación de Química y Farmacia del Uruguay |
| AQFU | Association of Chemistry and Pharmacy of Uruguay |
| AQPC | Association Qubcoise de Pdagogie Collgiale |
| AQPC | Association Québécoise de Pédagogie Collégiale |
| AQPC | Quebec Association of College Teaching |
| AQS | American Quilters Society |
| AR | Academia Româna |
| AR | Academia Romna |
| AR | Romanian Academy |
| ARAB | Association Royale des Actuaires Belges |
| ARAB | Koninklijke Vereniging van Belgische Actuarissen |