RDJ
| Acronym | Definition |
|---|---|
| RDJ | Robert Downey Jr. |
| RDJ | Rio De Janeiro (Brazil) |
| RDJ | Richard D. James (musician, see AFX) |
| RDJ | Règle du Jeu (French: Rules of the Game) |
| RDJ | Radio des Jeunes (French: Youth Radio) |
| RDJ | Route des Jeunes (French: Road of Youth; various locations) |
| RDJ | Random and Deterministic Jitter |