| NARS | N Autonoom Registrerende Seismografen 
| Others |
| NARS | National Agricultural Research System
| Others |
| NARS | National Agricultural Research Systems
| Others |
| NARS | National Agriculture Research System
| Others |
| NARS | National Aquatic Resource Surveys
| Others |
| NARS | National Archives and Record Services
| Others |
| NARS | National Archives and Records Service
| Others |
| NARS | National Asbestos Registry System
| Others |
| NARS | National Association of Radiation Survivors
| Others |
| NARS | National Association of Rail Shippers
| Others |
| NARS | National Authority for Road Safety
| Others |
| NARS | National Authority of Road Security
| Others |
| NARS | National Automated Response System
| Others |
| NARS | Natural Area Reserves System
| Others |
| NARS | Naval Aerial Robotic System
| Military, Air Force, Defence, Navy, Weapon |
| NARS | Naval Aerials Robotic System
| Others |
| NARS | Nested Arrays Research System
| Others |
| NARS | Network Alternate Route Selection
| Others |
| NARS | Network Audio Response System
| Others |
| NARS | Network of Autonomously Recording Seismographs
| Others |
| NARS | NNU Ad Revenue Sharing
| Others |
| NARS | Non Affiliated Reserve Section
| Others |
| NARS | Non Axiomatic Reasoning System
| Others |
| NARS | North American Rail Shippers
| Others |
| NARS | North Atlantic Radio System
| Others |
| NARS | Nursing Activity Reporting System
| Others |