| Acronym | Definition |
|---|
| EFCS | European Federation for Company Sport (est. 1962; Switzerland) |
| EFCS | Employees First, Customers Second (Vineet Nayar book) |
| EFCS | Electronic Front Curtain Shutter (cameras) |
| EFCS | École de Formation aux Carrières de Santé (French: Training School for Health Careers: Morocco) |
| EFCS | Electronic Flight Control System |
| EFCS | École de Formation aux Métiers de la Conduite et du Service (French: Trades Training School of Leadership and Service) |
| EFCS | Electronic Fare Collection System (transport system; various locations) |
| EFCS | European Federation of Cytology Societies |
| EFCS | Earth Fixed Coordinate System |
| EFCS | Electronic Filmless Camera System |
| EFCS | Electronic Fingerprint Capture Station |
| EFCS | Emergency Flight Control System (aviation; mechanical backups to hydraulic systems) |
| EFCS | Electric Flight Control System |
| EFCS | Extended Faceted Classification Schema |
| EFCS | Electric Fence Compliance Services (South Africa) |