| Abbreviation | Definition |
|---|---|
| ASCU | American Southwest Credit Union |
| ASDU | Austrian Show Dance Union |
| ASFB | Association of Salmon Fishery Boards (Scotland) |
| ASKU | American Shukokai Karate Union |
| ASLEF | Associated Society of Locomotive Engineers and Firemen |
| ASME | The American Society of Mechanical Engineers |
| ASOU | Australiaian Special Operations Union |
| ASSU | American Sunday School Union |
| ASSU | Arts and Science Students Union |
| ASTI | Association of Secondary Teachers of Ireland |
| ASUM | Amateur Swimming Union of Malaysia |
| ASUP | Academic Staff of Union of Polytechnics |
| ASUP | Academic Staff Union of Polytechnic |
| ASUP | Academic Staff Union of Polytechnics |
| ASUP | Academics Staff Union of Polytechnic |
| ASUU | Academic Staff of Universities Union |
| ASUU | Academic Staff Union of Uiversities |
| ASUU | Academic Staff Union of Universities |
| ASUU | Academic Staff Union of University |
| ASUU | All Student University Union |