| Acronym | Definition |
|---|
| FECS | Federation of European Chemical Societies |
| FECS | Federation of European Cancer Societies |
| FECS | Federation European Compact Sports |
| FECS | Food Export Consulting Services (Oregon) |
| FECS | Fédération Européenne de Catch Sportif (French: European Federation of Sports Catch) |
| FECS | Forward Error Correction Seconds (Nortel) |
| FECS | Far Eastern Cellular Systems (Russia) |
| FECS | Family & Early Childhood Services (Australia) |
| FECS | Foilborne Engine Control System |
| FECS | Fick Elite Crew Soldiers (gaming clan) |
| FECS | Fédération des Enseignants des Commissions Scolaires |