| Abbreviation | Definition |
|---|---|
| AATH | Association for Applied and Therapeutic Humor |
| AATI | American Association of Teachers of Italian |
| AATI | Argentine Association of Translators and Interpreters |
| AATM | Alberta Association of Therapeutic Masseurs |
| AATM | Arizona Association of Teachers of Mathematics |
| AATM | Asian Association Of Transfusion Medicine |
| AATP | Alabama Association of Testing Professionals |
| AATT | American Association of Teachers of Turkic |
| AATT | American Association of Teachers of Turkic Languages |
| AAU | Association of American University |
| AAUC | Association |
| AAUF | American Association of Urban Farmers |
| AAUF | Association of Advisers for Under Fives |
| AAUP | American Association of University Professors |
| AAUP | Association of American University Presses |
| AAUW | American Association of University Women |
| AAVA | Ayala Alabang Village Association |
| AAVC | American Association of Veterinary Clinicians |
| AAVF | African Association for Vertical Farming |
| AAW | American Association of Woodturners |