| AAAL | american academy of arts and letters |
|---|---|
| AAB | American Association for Bronchology |
| AAB | American Association of Bioanalytics |
| AACO | Asian Americans for Community Outreach |
| AAD | American Academy of Denturity |
| AAD | American Academy of Dermatology |
| AAN | American Academy of Neurology (skr.) |
| AAN | American Academy of Nursing |
| AAP | Academy of American Poets |
| AAPA | American Association of Port Authorities, Americké združenie prístavných úradov (angl.skr.) |