IRJ
| Acronym | Definition |
|---|---|
| IRJ | International Railway Journal (UK) |
| IRJ | Insulated Rail Joint |
| IRJ | Infrared Jammer |
| IRJ | iView Runtime for Java (SAP technology) |
| IRJ | Isolated Rabbit Jejunum |
| IRJ | Isnin Rabu Jumaat (Malay: Monday Wednesday Friday) |
| IRJ | Interim Radar Jammer |