| Abbreviation | Definition |
|---|---|
| AANA | American Association of Nurse Anesthetists |
| AANA | Arthroscopy Association of North America |
| AANA | Australian Association of National Advertisers |
| AANB | Archers Association of New Brunswick |
| AANB | Architects Association of New Brunswick |
| AANC | American Association of Nutritional Consultants |
| AANH | American Association of Natural Horsemen |
| AANL | Art Association Newfoundland Labrador |
| AANN | American Association of Neuroscience Nurses |
| AANS | American Association for Netherlandic Studies |
| AANS | American Association of Neurological Surgeons |
| AANS | Aquaculture Association of Nova Scotia |
| AANT | Automobile Association of the Northern Territory |
| AANV | Art Association Napa Valley |
| AANY | Abbot Association of New York |
| AANY | Association on Aging in New York |
| AAO | Archives Association of Ontario |
| AAO | Art Association of Oswego |
| AAO | Association of Architecture Organizations |
| AAOA | Advocates for the American Osteopathic Association |