| AAAL | american academy of arts and letters |
|---|---|
| AACO | Armenian American Christian Outreach |
| AARON | meno amerického herca Eckharta |
| AARONSON | americký astronóm (Marc, 1950 - 1987) |
| AAS | American Antiquarian Society |
| AAS | American Arachnological Society |
| AAVA | American Academy of Veterinary Acupuncture (skr.) |
| AAVA | American Association of Veterinary Anatomists |
| ABBEY | americký spisovateľ (Edward, 1927-1989) |
| ABBOT | americký astrofyzik (Charles Greeley, 1872-1973) |