sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Infrared Search and Track (system) | *** |
| Istituto Ricerca Settore Terziario | *** |
| Incident Response and Security Teams | ** |
| I Read Somewhere That | ** |
| Ionospheric Radio Systems Techniques | ** |
| Institute of Research in Science and Technology | * |
| Infra Red Search And Tracking | * |
| Infra Red Search Track | * |
| Initiative in Religion Science Technology | * |
| Improvement and Reform of Schools and Teaching | * |
| Interactive Remote Sensing Tool | * |