| Abbreviation | Definition |
|---|---|
| ALOHA | Aerial Locations of hazardous Atmospheres |
| ALOS | Average Length of Stay |
| ALOS | Advanced Land Observation Satellite |
| ALOT | Adaptive Large Optics Technologies |
| ALP | Anomalous Light Phenomena |
| ALP | Alkaline Phosphatase |
| ALP | Alpha Like Protein |
| ALP | Airport Layout Plan |
| ALP | Aerodynamic Lightweight Performance |
| ALP | Adult Learning Program |
| ALP | Automated Lands Project |
| ALP | Acute Leukemia Protocol |
| ALPA | Air Line Pilots Association |
| ALPC | Adaptive Link Power Control |
| ALPHA | Advanced Lightweight Protective Helmet for Aircrew |
| ALPHA | Adolescents Learning Positive Health Alternatives |
| ALPO | Association Of Lunar And Planetary Observers |
| ALPS | Applications And Libraries For Physics Simulations |
| ALPS | Autoimmune LymphoProliferative Syndrome |
| ALPS | Approach and Landing Procedures Simulator |
| ALPS | Active Learning Practice For Schools |
| ALPS | Accessible Large Playground Structure |
| ALPV | Aphid Lethal Paralysis Virus |
| ALQA | Active Link Quality Analysis |
| ALR | Automative Locking Retractor |
| ALR | Active Life Reserves |
| ALRA | Alberta Lacrosse Referees Association |
| ALRUTS | Automated Line Replaceable Unit Tracking System |
| ALS | Advanced Low-power Schottky |
| ALS | Application Layer Structure |
| ALS | Automatic Line Switching |
| ALS | Advanced Life Support |
| ALS | Alternate Life Source |
| ALS | Automatic Landing System |
| ALS | Approach Landing System |
| ALS | Alternate Landing Site |
| ALS | Airlock System |
| ALS | Advanced Launch System |
| ALS | Advance Logistics System |
| ALS | Approach Lighting System |
| ALS | Anti Line Slap |
| ALS | American Learning System |
| ALS | Action Learning Sets |
| ALS | Additional Learning Support |
| ALS | Action Logic System |
| ALS | Artificial Limbs Scheme |
| ALSA | Advanced Linux Sound Architechure |
| ALSA | Astronaut Life Support Assembly |
| ALSA | Advanced Linux Sound Architecture |
| ALSA | Alberta Land Surveyors Association |