| Abbreviation | Definition |
|---|---|
| AASP | American Association of Senior Physicians |
| AASP | Arizona Association of School Psychologists |
| AASP | Association for Applied Sport Psychology |
| AASP | Association of Advancement Services Professional's |
| AASP | Association of Applied Sport Psychology |
| AASR | African Association for the Study of Religions |
| AASSDN | Amicale des Anciens des Services Spéciaux de la Défense Nationale (French: Association of Former Special Services of the National Defense) |
| AAST | American Association for the Surgery of Trauma |
| AAST | American Association Of State Troopers |
| AAT | Association of Accounting Technicians |
| AATA | Amarillo Area Tennis Association |
| AATA | American Addiction Treatment Association |
| AATA | American Art Therapy Association |
| AATA | Arizona Agriculture Teachers Association |
| AATA | Arkansas Athletic Trainers Association |
| AATA | Australian Accordion Teachers Association |
| AATC | Apartment Association of Tarrant County |
| AATE | Australian Association for the Teaching |
| AATF | American Association of Teachers of French |
| AATG | American Association of Teachers of German |