| Abbreviation | Definition |
|---|---|
| ADRI | Aoki Diabetes Research Institute |
| ADRI | Asbestos Diseases Research Institute |
| ADRI | Asian Demographic Research Institute |
| ADRI | Asian Development Research Institute |
| ADTI | Alexis De Tocqueville Institution |
| AEEI | Advanced Energy Economy Institute |
| AEI | Accredited Education Institutes |
| AEI | Albert Einstein Institute |
| AEI | Alternative Education Institute |
| AEI | American English Institute |
| AEII | Allen Entrepreneurial Institute International |
| AESI | Advanced Engine System Institute |
| AETI | American Export Training Institute |
| AETI | Automobile Engineering Training Institute |
| AFDSI | American Food Data Systems Institute |
| AFFI | American Frozen Food Institute |
| AFHI | American Family Happily Institute |
| AFI | Access to Financial Institutions |
| AFI | American Film Institute's |
| AFID | Armed Forces Institute of Dentistry |