| IFSA | Illinois Fire Safety Alliance 
| Others |
| IFSA | Inflight Food Service Association
| Others |
| IFSA | Institute for Study Abroad
| Others |
| IFSA | International Farming Systems Association
| Others |
| IFSA | International Federation of Strength Athletes
| Others |
| IFSA | International Feed Safety Alliance
| Others |
| IFSA | International Feng Shui Association
| Others |
| IFSA | International Financial Services Association
| Others |
| IFSA | International Fire Sprinkler Association
| Others |
| IFSA | International Flight Services Association
| Others |
| IFSA | International Forensic Strategic Alliance
| Others |
| IFSA | International Forestry Students' Association
| Others |
| IFSA | International Free Skiers Association
| Others |
| IFSA | International Freeskiers and Snowboarders Association
| Others |
| IFSA | International Freestyle Sports Association
| Others |
| IFSA | International Frequency Sensor Association
| Others |
| IFSA | International Fuzzy Systems Association
| Others |
| IFSA | Internet Fax Study Association
| Others |
| IFSA | Investment and Financial Services Association
| Others |
| IFSA | Irish Foodservice Suppliers Alliance
| Others |
| IFSA | Islamic Forum for Science and Arts
| Others |