| Acronym | Definition |
|---|
| IAFF | International Association of Fire Fighters |
| IAFF | Irish Amateur Fencing Federation |
| IAFF | International Animated Film Festival |
| IAFF | International Advertising Film Festival (now Cannes Lions International Festival of Creativity; Cannes, France) |
| IAFF | Indo-American Friendship Foundation |
| IAFF | International Amputee Football Federation |
| IAFF | Impairment-Aware First-Fit |
| IAFF | International American Football Federation |
| IAFF | Initial Attorney Fee File |
| IAFF | International Arts & Film Foundation |
| IAFF | International Air Freight Forwarder |