| Acronym | Definition |
|---|
| ISTA➣International Safe Transit Association |
| ISTA➣Indiana State Teachers Association |
| ISTA➣International Seed Testing Association |
| ISTA➣International Sail Training Association |
| ISTA➣Information, Science, and Technology Agency (British Columbia) |
| ISTA➣International Society for Technology in Arthroplasty |
| ISTA➣Intelligence, Surveillance & Target Acquisition |
| ISTA➣International Symposium on Technology and Analysis |