IEFS
| Acronym | Definition |
|---|---|
| IEFS | International Economics and Finance Society (various locations) |
| IEFS | International Energy Forum Secretariat |
| IEFS | Institute for European Food Studies (nutrition) |
| IEFS | International Exotic Feline Sanctuary |
| IEFS | Industrial Exemption Factory Scheme (Singapore) |
| IEFS | Isometric Elbow Flexor Strength |