| Abbreviation | Definition |
|---|---|
| ALI | Automatic Location Indicator |
| ALI | Automatic Location Information |
| ALI | Automotive Lift Institute |
| ALK | Anti-Lift Kit |
| ALLM | Automobile Lending and Leasing Manual |
| ALLV | Air Launched Launch Vehicle |
| ALM | Always Luggage Missing |
| ALNOT | ALert NOTice |
| ALON | Airline Liaison Officer Network |
| ALP | Airport Layout Plan |
| ALPA | Air Line Pilots Association |
| ALPR | Automated License Plate Recognition |
| ALS | Approach and Landing System |
| ALS | Approach Lighting System |
| ALSF | Approach Lighting System With Sequenced Flashing Lights |
| ALSF-I | Approach Light System with Sequenced Flashing lights in ILS Category I Configuration |
| ALSF-II | Approach Light System with Sequenced Flashing lights - CAT-II Modification |
| ALSF-II | Approach Light System with Sequenced Flashing lights - CAT-II Modification |
| ALSIP | Approach Lighting System Improvement Program |
| ALST | A Long Strange Trip |