| Acronym | Definition |
|---|
| FDNS➣Fraud Detection and National Security |
| FDNS➣Front de Défense des Non-Syndiqué-es (French: Front for the Defence of Non-Unionized Workers; Canada) |
| FDNS➣Finite-Difference Navier Stokes (code) |
| FDNS➣Fighting Dems News Service |
| FDNS➣Fast Domain Name Service (computing) |
| FDNS➣Frontul Democrat al Salvarii Nationale (Romanian: Democratic National Salvation Front) |