| NSRI | National Salt Reduction Initiative 
| Others |
| NSRI | National Sea Rescue Institute
| Others |
| NSRI | National Sea Rescue Institution
| Others |
| NSRI | National Security Research Institute
| Others |
| NSRI | National Soil Resources Institute
| Others |
| NSRI | National Storm Recovery Inc
| Others |
| NSRI | National Strategic Research Institute
| Others |
| NSRI | National Subsea Research Initiative
| Others |
| NSRI | Natural Sciences Research Institute
| Others |
| NSRI | Nauman Social Responsibility Initiative
| Others |
| NSRI | Nippon Steel Research Institute
| Others |
| NSRI | Nonprofit Sector Resource Institute
| Others |
| NSRI | Nonselective Serotonin Reuptake Inhibitor
| Others |
| NSRI | Norepinephrine Selective Reuptake Inhibitor
| Others |
| NSRI | Norepinephrine Serotonin Reuptake Inhibitors
| Others |
| NSRI | Northern Street Rods Inc.
| Others |
| NSRI | Noxious Stimulation Response Index
| Others |
| NSRI | Nuclear Studies Research Initiative
| Others |
| NSRI | NYK Systems Research Institute
| Others |