| Acronym | Definition |
|---|
| RNIS➣Réseau Numérique à Intégration de Services (French: ISDN) |
| RNIS➣Refugee Nutrition Information System (UN) |
| RNIS➣Renault-Nissan Information Services (car alliance) |
| RNIS➣Ritu Nanda Insurance Services (India) |
| RNIS➣Road Network Inventory System |