| Acronym | Definition |
|---|
| ACST | Australian Central Standard Time |
| ACST | Australian Central Standard Time (time zone) |
| ACST | Acoustic |
| ACST | Asymptomatic Carotid Surgery Trial (UK; Medical Research Council) |
| ACST | Advisory Council on Science and Technology (Canada, PM) |
| ACST | Advanced Contingency Skills Training (US Air Force) |
| ACST | Avon Community Swim Team (Indiana) |
| ACST | Agni Computer Security Technologies |
| ACST | Accredited Committee Secretary-Treasurer (OACA) |
| ACST | Airborne Communications Specialist Technician |
| ACST | Association of Consulting Science and Technology |
| ACST | Army Clerical Speed Test |