| ARRG |
Atlantic Region Reefers Group |
| ARRL |
American Radio Relay League |
| ARRL |
Amateur Radio Relay League |
| ARROW |
Anti-Resonant Reflecting Optical Waveguide |
| ARRSTC |
Asian Regional Remote Sensing Training Centre |
| ARRT |
Adult Reading Round Table |
| ARS |
Agricultural Research Service |
| ARS |
Agricultural Research Services |
| ARS |
Acute Retroviral Syndrome |
| ARS |
Atypical Rheumatic Syndrome |
| ARS |
Awards And Recognition Specialists |
| ARS |
Authentication Response |
| ARS |
Attitude Reference System |
| ARS |
Archive and Retrieval Subsystem (PPCU) |
| ARS |
Air Revitalization System |
| ARS |
Autonomously Replicating Sequence |
| ARS |
Arizona Revised Statutes |
| ARS |
Audience Response System |
| ARS |
Alternate Route Selection |
| ARS |
Amateur Radio Service |
| ARSA |
Airport Service Radar Area |
| ARSA |
Airport Radar Service Area |
| ARSA |
Airborne Reconnaissance and Surveillance Architecture |
| ARSB |
Automated Repair Service Bureau |
| ARSC |
Australian Remote Sensing Conference |
| ARSC |
Accounting and Review Services Committee |
| ARSD |
Alcohol Related Spectrum Disorder |
| ARSOF |
Army special operations forces |
| ARSR |
Air Route Surveillance Radar |
| ART |
Algebraic Reconstruction Technique |
| ART |
Adaptive Resonance Theory |
| ART |
Achilles tendon Reflex Test |
| ART |
Adrenaline Response Training |
| ART |
Anti-Retroviral Therapy |
| ART |
Assume Room Temperature |
| ART |
Advanced Release Technology |
| ART |
Advanced Reproductive Technologies |
| ART |
Adjustable Ranging Telescope |
| ART |
Africa Resources Trust |
| ART |
Advanced Racing Technology |
| ART |
Advanced Reflexology Training |
| ART |
Active Release Technique |
| ART |
Advanced Reiki Training |
| ART |
Audio Response Terminal |
| ART |
Aggression Replacement Training Programme |
| ART |
Advanced Reporting Toolkit |
| ART |
Advanced Rendering Technology |
| ARTC |
Accounts Receivable Truncated Checks |
| ARTCC |
Air Route Traffic Control Center |
| ARTEMI |
Advanced Relay Technology Mission |