| Abbreviation | Definition |
|---|---|
| AAL | Argentine Academy of Letters |
| AALR | American Association for Leisure and Recreation |
| AALS | African American Leadership Society |
| AAM | Argentine Assocation of Microbiology |
| AAM | Asociacin Argentina de Microbiologa |
| AAM | Asociación Argentina de Microbiología |
| AAMPS | African American Music Preservation Society |
| AAMRCG | Argentine Association of Medical Residents of General Surgery |
| AAMRCG | Asociacin Argentina de Mdicos Residentes de Ciruga General |
| AAMRCG | Asociación Argentina de Médicos Residentes de Cirugía General |
| AAMS | American Air Mail Society |
| AAN | Australian Association of Neurologists |
| AANC | Argentine Association of Neurosurgery |
| AANC | Asociacin Argentina de Neurociruga |
| AANHS | African American National Heritage Society |
| AANHS | Archaelogical and Natural History Society |
| AANHS | Arkansas Association of National Honor Society |
| AANHS | Ayrshire Archaeological and Natural History Society |
| AAOC | Argentine Association of Clinical Oncology |
| AAOC | Asociacin Argentina de Oncologa Clnica |