| Acronym | Definition |
|---|
| FNCS | Fédération Nationale des Centres de Santé (French: National Federation of Health Centers) |
| FNCS | Fédération Nationale des Cadres Supérieurs (French: National Federation of Senior Executives of Electricity and Gas) |
| FNCS | Fédération Nationale des Chorales Scolaires (French: National Federation of School Choirs) |
| FNCS | Food, Nutrition and Consumer Services (USDA) |
| FNCS | Fidelity National Credit Services |
| FNCS | Full Naval Control of Shipping |
| FNCS | Falcon Northwest Computer Systems |
| FNCS | Flipper Natation Club St. Georges (French: St. George Flipper Swimming Club) |
| FNCS | Facial Motor Nerve Conduction Studies (neurophysiology) |