IWTF
| 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 |