| IWF | Idaho Wildlife Federation
| Others |
| IWF | Independent Women's Forum
| Others |
| IWF | Independent Womens Forum
| Others |
| IWF | Independent Wrestling Federation
| Others |
| IWF | India Water Forum
| Others |
| IWF | Indiana Wildlife Federation
| Others |
| IWF | Individual Weighting Factor
| Others |
| IWF | Information and Warning Functions
| Others |
| IWF | Integrated Water Factor
| Others |
| IWF | Inter Working Function
| Others |
| IWF | Inter-Working Function
| Others |
| IWF | International Weightlifting Federation
| Others |
| IWF | International Women's Forum
| Others |
| IWF | International Woodworking Fair
| Others |
| IWF | International Wrestling Federation
| Others |
| IWF | Internet Watch Foundation
| Others |
| IWF | Internet Wrestling Federation
| Others |
| IWF | IWAS Wheelchair Fencing
| Others |