| Abbreviation | Definition |
|---|---|
| AGC | Automatic Generation Control |
| A-GEMTF | Advanced Generic Equipment Model Task Force |
| AGGR | Aggregation |
| AGREE | Advisory Group on Reliability of Electronic Equipment |
| AGV | Automated Guided Vehicle |
| AH | Ampere Hours |
| AH | Artificial Harmonic |
| AHB | Advanced High-performance Bus |
| AHET | Albany Hudson Electric Trail |
| AHI | Audio Hardware Interface |
| AHKEA | America Hong Kong Electronics Association |
| AHS | Automated Highway System |
| AI | Analog Input |
| AIA | Active Integrated Antenna |
| AIC | Ampere Interrupting Current |
| AICD | Automatic Implantable Cardiac Defibrillator |
| AIE | Advanced Interior Electronics |
| AIE | American International Electric |
| AIEC | Association of Illinois Electric Cooperatives |
| AIEE | American Institute of Electrical Engineers |