English abbreviations from iris to irn
- IRIS (I Recycle In Sherman)
- IRISA (Intelligence Report Index Summary File)
- IRJ (Capitán Vicente Almandos Almonacid Airport)
- IRJH (Infrared Jammer Head)
- IRK (Kirksville Regional Airport)
- IRL (Independent Reading Level)
- IRLP (Internet Radio Linking Project)
- IRM (Interference Reflection Microscopy)
- IRMA (Intra-retinal microvascular abnormality)
- IRMO (Information Resources Management Office)
- IRMS (Information Resource Management Services)
- IRN (Iran (ISO 3166 trigram))