| AAAL | american academy of arts and letters |
|---|---|
| AAB | American Association for Bronchology |
| AAB | American Association of Bioanalytics |
| AAB | Anglo American Book |
| AACO | American Association of Certified Orthoptists |
| AACO | Armenian American Christian Outreach |
| AACO | Asian Americans for Community Outreach |
| AAD | American Academy of Denturity |
| AAD | American Academy of Dermatology |
| AAE | American Association of Engineers (skr.) |