| 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 |