| Acronym | Definition |
|---|
| IWTF➣Irish Working Terrier Federation (UK and Ireland) |
| IWTF➣Industrial Waste Treatment Facility |
| IWTF➣Inland Waterways Trust Fund (USACE) |
| IWTF➣International Wheelchair Tennis Federation (est. 1998) |
| IWTF➣Institut für Wissenschaftstheorie und-Forschung |