ISTR
| Acronym | Definition |
|---|---|
| ISTR | I Seem to Remember |
| ISTR | It Stands To Reason |
| ISTR | I Seem To Recall |
| ISTR | Internet Security Threat Report (Symantec) |
| ISTR | Institute of Safety in Technology and Research (UK) |
| ISTR | International Society for Third-Sector Research |
| ISTR | Internet Security Threat Report |
| ISTR | Internationales Steuerrecht (German: International Tax) |
| ISTR | Interoperability Standards Technical Reports |
| ISTR | Information Security and Testing Research |
| ISTR | Institute for Science Training and Research |