| Acronym | Definition |
|---|
| ISTF | International Society of Tropical Foresters |
| ISTF | Internet Science and Technology Fair |
| ISTF | Industrial Science and Technology Frontier |
| ISTF | Installed System(s) Test Facility |
| ISTF | International Spring Trade Fair (Karachi, Pakistan) |
| ISTF | International Surgical Thrombosis Forum |
| ISTF | International Sepak Takraw Federation (athletic association) |
| ISTF | Interface Simulation and Testing Framework (IONA) |
| ISTF | Integrated Space Technology Flights |
| ISTF | Integrated Systems Task Force |
| ISTF | Ion Source Test Facility |
| ISTF | Illumination System Transfer Function |