| Acronym | Definition |
|---|
| ISTO➣Industry Standards and Technology Organization (IEEE) |
| ISTO➣Information Science & Technology Office (DARPA) |
| ISTO➣International Standardized Testing Organization (est. 2001) |
| ISTO➣Interessengemeinschaft Spezialisierter Tour-Operators (Zurich, Switzerland) |
| ISTO➣Irish Student Trampoline Open |
| ISTO➣Information Sciences Technology Office |