| 3Gs | Grow Greed Gluttony | |
| A&S | Arts and Sciences | |
| A4NH | Agriculture for Nutrition and Health | |
| AAAAI | American Academy of Allergy, Asthma & Immunology | |
| AACR | American Association of Cancer Research | |
| AACR | American Association for Cancer Research | |
| AADR | American Association for Dental Research | |
| AAHPER | African Association for Health Professions Education and Research | |
| AAHR | Australian Association for Humane Research | |
| AAIR | American Association of International Researchers | |
| AAIR | Assessment Accreditation and Institutional Research | |
| AAIR | Australian Association for Institutional Research | |
| AAIR | Aviation Archaeological Investigation and Research | |
| AAMI | Association for the Advancement of Medical Instrumentation | |
| AAMR | AIBD Annual Media Research | |
| AAMRI | Association of Australian Medical Research Institutes | |
| AAMRI | African American Male Research Initiative | |
| AANCART | Asian American Network for Cancer Awareness, Research and Training | |
| AAPR | Annals of Anatomy and Physiology Research | |
| AAR | Advanced Authentic Research | |
| AARB | American Association for Research in Baghdad | |
| AARC | Association for Assessment and Research in Counseling | |
| AARC | Assassination Archives and Research Center | |
| AARC | Authentication and Authorisation for Research and Collaboration | |
| AARC | Applied Anatomical Research Center | |
