| Abbreviation | Definition |
|---|---|
| ARL | Adult rat liver |
| ARL | Aerospace Robotics Lab |
| ARL | Alternative Route to Licensure |
| ARL | Alternative Routes to Licensure |
| ARL | American Roadrunners Luxembourg |
| ARL | Anti Reflective Lenses |
| ARL | Anti Reversal Latch |
| ARL | Application Readiness Level |
| ARL | Attock Refinery Limited |
| ARL | Austin Reliability Labs |
| ARL | Automatic Room Lighting |
| ARL | Autonomous Robots Lab |
| ARL | average run lengths |
| ARLISS | A Rocket Launch for International Student Satellites |
| ARLN | Antibiotic Resistance Lab Network |
| ARLO | Advanced Rover for Lunar Operations |
| ARLS | Advanced Radiology Life Support |
| ARLS | Alberta Regional Lily Society |
| ARLS | Amateur Radio Lighthouse Society |
| ARLS | Automatic Resource Location System |