| Abbreviation | Definition |
|---|---|
| ACEAR | Ambala College of Engineering and Applied Research |
| ACEC | American Council of Engineering Companies |
| ACEC | Aridi Contracting and Engineering Company |
| ACED | Australian Council of Engineering Deans |
| ACEG | Anhui Construction Engineering Group |
| ACEI | Associated Consulting Engineering Incorporated |
| ACEM | Advances in Civil Engineering Materials |
| ACEM | Aravali College of Engineering and Management |
| ACES | Automated Communications Engineering Software |
| ACESS | Akron Council of Engineering and Scientific Societies |
| ACET | Advancement Council for Engineering and Technology |
| ACET | Aligarh College of Engineering and Technology |
| ACH | Air Changes per Hour |
| ACID | Access Control and Intrusion Detection |
| ACM | Air Cycle Machine |
| ACME | Architecture Construction Manufacturing Engineering |
| ACP | Air Compression Pump |
| ACRS | Atmospheric Corrosion Resistant Steel |
| ACSE | Advances in Ceramic Science and Engineering |
| ACSE | Automatic Control Systems Engineering |