MRJ
| Acronym | Definition |
|---|---|
| MRJ | Mitsubishi Regional Jet |
| MRJ | Macintosh Runtime for Java |
| MRJ | Men of Reform Judaism (est. 1926; New York, NY; formerly National Federation of Temple Brotherhoods) |
| MRJ | Macintosh OS Runtime for Java |
| MRJ | Montague Rhodes James (ghost story writer) |
| MRJ | Marine Rescue Japan |
| MRJ | Mensa Research Journal (Mensa Education and Research Foundation) |
| MRJ | Maximally Random-Jammed |