| Abbreviation | Definition |
|---|---|
| ACA | Anisotropically Conductive Adhesive |
| ACAD | Anodized Ceramic Aluminum Diaphragm |
| ACAR | Aluminium Conductor Alloy Reinforced |
| ACB | Air Circuit Breaker |
| ACB | Alternating Current Balancer |
| ACC | Actual Carriers Created |
| ACCEPT | Ammonia Cracking for Clean Electric Power Technology |
| ACCI | Accelerated Coated Conductor Initiative |
| ACCV | Analog Collector Control Voltage |
| ACDC | Alternating Current, Direct Current |
| ACDS | Advanced Current Detection System |
| ACE | Advanced Combination Encoder |
| ACE | Alternating Conditional Expectation |
| ACE | Area Control Error |
| ACE | Automatic Color Equalization |
| ACE | Automatic Control Environment |
| ACF | Anisotropic Conductive Film |
| ACF | Auto-Correlation Function |
| ACGI | Adaptive Control Grid Interpolation |
| ACHV | Air conditioning, Heating, and Ventilation |