| Acronym | Definition |
|---|
| CNIG➣Conseil National de l'Information Geographique (French: Commission on National Geographic Information; France) |
| CNIG➣Centro Nacional de Informação Geográfica (Portuguese: National Center of Geographic Information; now Sistema Nacional de Informação Geográfica) |
| CNIG➣Childbirth Nurses' Interest Group (now Maternal Child Nurses' Interest Group; Canada) |
| CNIG➣China Nuclear Industry Group |
| CNIG➣Community Networking Infrastructure Grant (Canada) |