ISTAR
| Acronym | Definition |
|---|---|
| ISTAR | Intelligence, Surveillance, Target Acquisition, and Reconnaissance (warfare) |
| ISTAR | Institute for Stuttering Treatment and Research |
| ISTAR | Indiana Standards Tool for Alternate Reporting (education assessment system; Indiana) |
| ISTAR | Integrated System Test of an Airbreathing Rocket (US NASA) |
| ISTAR | Institute of Strategic Threat Analysis and Response (University of Pennsylvania) |