| Abbreviation | Definition |
|---|---|
| IFF | International Footwear Federation |
| IFGS | Institute for Family and Gender Studies |
| IFI | Industrial Fasteners Institute |
| IFLA | International Federation of Library Associations and Institutions |
| IFMA | International Fire Marshals Association |
| IFOAM | International Federation of Organic Agriculture Movements |
| IFPMA | International Federation of Pharmaceutical Manufacturers Associations |
| IFPMA | International Federation of Pharmaceutical Manufacturers & Associations |
| IFPMA | International Federation of Pharmaceutical Manufacturers Associations |
| IFPS | International Fluid Power Society |
| IFPTE | International Federation of Professional and Technical Engineers |
| IFSA | Illinois Fire Safety Alliance |
| IFSA | Inflight Food Service Association |
| IFSA | International Farming Systems Association |
| IFSA | International Financial Services Association |
| IFSA | International Frequency Sensor Association |
| IFSA | Investment and Financial Services Association |
| IFTA | International Family Therapy Association |
| IFWTWA | International Food Wine and Travel Writers Association |
| IGA | Island Grocers Association |