| Abbreviation | Definition |
|---|---|
| ACSU | Academic Computing Services Unix |
| ACSU | American Cancer Society University |
| ACSU | Association Of Computer Science Undergraduates |
| ACT | Academic, Creative, and Technical |
| ACT | Associates of Campus Theatre |
| ACTE | Advanced Career Transition Education |
| ACTI | Advanced Computational Technology Initiative |
| ACTI | Association of Caribbean Tertiary Institutions |
| ACTS | African Centre for Technology Studies |
| ACTS | Asian Christian Theological Studies |
| ACTS | Association of Chicago Theological Schools |
| ACTT | Academic Contributors for Today and Tomorrow |
| ACTT | Advanced Center for Technology Training |
| ACU | Abilene Christian University |
| ACU | African Christian University |
| ACU | Ajayi Crowther University, Ibadan |
| ACU | Arizona Christian University |
| ACU | Association of Commonwealth Universities |
| ACUDS | Atlantic Common University Data Set |
| ACUP | Animal Care and Use Program |