| Abbreviation | Definition |
|---|---|
| ALC | Audio Limiter Control |
| ALD | Assistive Listening Device |
| ALD | Atomic Layer Deposition |
| ALE | Application Logic Element |
| ALE | Atomic Layer Epitaxy |
| ALEC | Association of Louisiana Electric Cooperatives |
| ALEKS | Awfully Lame Electronic Karma System |
| ALES | Altitude Limited Electric Soaring |
| ALF | Advanced Linear-fit Filter |
| ALFC | Automatic Load Frequency Control |
| ALGAAS | Aluminum Gallium Arsenide |
| ALGAN | Aluminum Gallium Nitride |
| ALIEN | Atomic Layer Interface Engineering for Nanoelectronics |
| ALIVH | Any Layer Interstitial Via Hole |
| ALLD | Automatic Line Leak Detector |
| AL-PCB | Aluminum trace Printed Circuit Boards |
| ALPHA | Advanced Lightweight Protective Helmet for Aircrew |
| ALR | Amps-Locked Rotor |
| ALS | Advanced Light Source |
| ALS | Advanced Low-power Schottky |