| Acronym | Definition |
|---|
| IRST➣Intel Rapid Storage Technology (Intel Corp.) |
| IRST➣Infrared Search and Track (US DoD) |
| IRST➣Iran Standard Time (time zone) |
| IRST➣Istituto per la Ricerca Scientifica e Tecnologica (Centre for Scientific and Technological Research, Istituto Trentino di Cultura, Trento, Italia) |
| IRST➣Institute for Scientific and Technological Research |
| IRST➣Ionospheric Radio Systems and Techniques (conference) |
| IRST➣Incident Response and Security Team |
| IRST➣Immediate Response Spill Technologies, LLC (Louisville, KY) |