| Acronym | Definition |
|---|
| NRIS➣National Register Information System (US National Park Service) |
| NRIS➣Natural Resource Information System |
| NRIS➣Nomura Research Institute Singapore |
| NRIS➣New Republic Intelligence Service (Star Wars) |
| NRIS➣Nursing Research Initiative for Scotland |
| NRIS➣National Registration and Inquiry System (various nations) |
| NRIS➣NASA Research Information Service |
| NRIS➣National Resource Inventory System (USDA) |