| Abbreviation | Definition |
|---|---|
| ACSW | Alberta College of Social Workers |
| ACT | American College Test |
| ACTB | Australian College of Technology and Business |
| ACTC | Andhra Christian Theological College |
| ACTC | Ashland Community and Technical College |
| ACTC | Associated Colleges of the Twin Cities |
| ACTF | American College Theater Festival |
| ACTL | American College of Trial Lawyers |
| ACTM | Atlantic College of Therapeutic Massage |
| ACTOR | Approved College and Training Organisation Register |
| ACTS | Asomugha College Tour for Scholars |
| ACUA | Association of College and University Auditors |
| ACUA | Association of College University Auditors |
| ACUC | Association of College and University Clubs |
| ACUE | Association of College and University Educators |
| ACUI | Association of College Unions International |
| ACUP | Association of College and University Printers |
| ACURA | Abington College Undergraduate Research Activities |
| ACVA | American College for Vedic Astrology |
| ACVA | American College of Vedic Astrology |