| Acronym | Definition |
|---|
| ITSF➣International Table Soccer Federation |
| ITSF➣Innovative Technologies from Science Fiction for Space Applications (research study) |
| ITSF➣Indonesia Toray Science Foundation (Toray Industries, Inc.) |
| ITSF➣International Telecom Sync Forum (est. 2001) |
| ITSF➣Information Technology Security Forum (American Petroleum Institute) |
| ITSF➣Insulin, Transferrin, Selenium, and Fibronectin (stem cell research) |