| Abbreviation | Definition |
|---|---|
| A2 | Ann Arbor, Michigan |
| AA | Ann Arbor |
| AAAA | Ann Arbor Administrators Association |
| AAAC | African American Affairs Commission |
| AAAD | Area Agency on Aging and Disability |
| AAB | Architectural Access Board |
| AAC | Alaska Administrative Code |
| AACM | Arizona Association of Community Managers |
| AAFA | Arkansas Association of Facilities Administrators |
| AAHC | Arizona Adolescent Health Coalition |
| AAI | All Aspects of Industry |
| AALA | Associated Administrators of Los Angeles |
| AAPC | Area Agency Program Coordinator |
| AAPU | Application Assistance Payment Unit |
| AARC | Alabama Association of Regional Councils |
| AARD | Agricultural Agency for Research and Development |
| AARI | Archaeological Area of Regional Importance |
| AASD | Assistance for AIDS Specific Drugs |
| AASR | Ancient Accepted Scottish Rite |
| AATA | Association of Alabama Tax Administrators |