| Acronym | Definition |
|---|
| CNIS | Conseil National de l'Information Statistique (French: National Council of Statistical Information) |
| CNIS | Canadian Network for International Surgery (Vancouver, BC Canada) |
| CNIS | Centre National de l'Informatique et des Statistiques (French) |
| CNIS | Coordinamento Nazionale degli Insegnanti Specializzati |
| CNIS | Calling Number Identification Service |
| CNIS | Computer Networks and ISDN (Integrated Services Digital Network) Systems (publication) |
| CNIS | Channel Navigation Information Scheme |
| CNIS | Carotid Noninvasive Studies |