| Abbreviation | Definition |
|---|---|
| ATU | Arkansas Tech University |
| ATV | American University Television |
| ATVI | Albuquerque Technical Vocational Institute |
| AU | Aarhus University |
| AU | Adelphi University |
| AU | Air University |
| AU | Alfaisal University |
| AU | Alfred University |
| AU | Almeda University |
| AU | American University |
| AU | Anadolu University |
| AU | Anderson University |
| AU | Andhra University |
| AU | Andrews University |
| AU | Anna University |
| AU | Ashford University |
| AU | Assumption University of Thailand |
| AU | Athabasca University |
| AU | Athletic Union |
| AU | Auburn University |