| Abbreviation | Definition |
|---|---|
| ACME | American Company Makes Everything |
| ACMI | Arts and Creative Materials Institute |
| ACMI | Australian Centre for the Moving Image |
| ACMRR | Australian Centre for Minesite Rehabilitation Research |
| ACMRS | Arizona Center for Medieval and Renaissance Studies |
| ACMS | American Center for Mongolian Studies |
| ACMS | American College of Mohs Surgery |
| ACNS | Academic Computing Networking Services |
| ACO | Australian Calculator Operation |
| ACOSA | Aquinas Council of Student Activities |
| ACP | Additional Computational Practice |
| ACP | Applied Communication Program |
| ACPC | Academic Computing Policy Committee |
| ACPC | Alberta Collegiate Programming Contest |
| ACPC | Association Canadienne des Professeurs de Comptabilit |
| ACPC | Austrian Center for Parallel Computation |
| ACPRC | Age and Cognitive Performance Research Centre |
| ACQ | Academic Call To Quarters |
| ACRC | Alaskan Climate Research Center |
| ACRC | Asthma Clinical Research Center |