English abbreviations from irp to irt
- IRP (Matari Airport)
- IRPS (International Reliability Physics Symposium)
- IRQ (Iraq (ISO 3166 trigram))
- IRR (Iranian rial (ISO 4217 currency code))
- IRR(s) (incidence rate ratio(s))
- Irregulte. (Irregularitate ("Irregularity" abl. case))
- IRRI (International Rice Research Institute)
- IRRT (International Relations Round Table)
- IRS (Inertial Reference System)
- IRSA ((organization) Infrared Science Archive)
- IRSN (Institut de radioprotection et de sûreté nucléaire (French, "Institute for Radiation Protection and Nuclear Safety"))
- IRST (Infra-red Search and Track)
- IRSTS (Infrared Search and Track Sensor)
- IRT ("in reference to...")
