| Acronym | Definition |
|---|
| EFSR | Etherfast Router |
| EFSR | Emergency Food Security Reserve (various organizations) |
| EFSR | Évaluation Formation Sécurité Routière (French driving instruction) |
| EFSR | Economic and Fiscal Strategy Report |
| EFSR | École de Formation a la Sécurité Routière (French: School Road Safety Education) |
| EFSR | Early Suppression Fast Response (fire sprinkler) |
| EFSR | Electronic Field Service Record |
| EFSR | East Fork Salmon River (Idaho) |
| EFSR | European Financial Services Roundtable (Brussels, Belgium) |
| EFSR | Encrypting File System Remote |