| ISTN | Improved Super Twisted Nematic 
| Others |
| ISTN | Inferior Superior Temporal and Nasal
| Others |
| ISTN | Information Service Television Network
| Others |
| ISTN | Institute for Semiconductor Technology and Nanoelectronics
| Others |
| ISTN | Institute for the Study of Traditional Naturopathy
| Others |
| ISTN | Integrated Switching and Transmission Network
| Others |
| ISTN | Intelligent Super Twisted Nematic
| Others |
| ISTN | International Student Training Network
| Others |
| ISTN | Internet Serbia Travel News
| Others |
| ISTN | Iran Seismic Telemetry Network
| Others |