ISTO
| 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 |