| Acronym | Definition |
|---|
| OSJ➣Optical Society of Japan (Japan Society of Applied Physics) |
| OSJ➣Office of Supervisory Jurisdiction (SEC) |
| OSJ➣Orchestra of St John's (London, UK) |
| OSJ➣Opera San Jose (San Jose, California) |
| OSJ➣Order of St. John of Jerusalem (Knights of Malta) |
| OSJ➣Oblates of St. Joseph (religious order) |
| OSJ➣Ocean Science Journal (Korea) |
| OSJ➣Open Source Japan |
| OSJ➣Order of St. James (Christian group) |
| OSJ➣Open Stub J-Pole (amateur radio antenna) |
| OSJ➣Order of the Knights Hospitaller of St. John of Jerusalem, Palestine, Rhodes, and Malta |