| Acronym | Definition |
|---|
| RDB | Reference Design Board (various companies) |
| RDB | Receptor Data Base |
| RDB | Replace Database with Blanks |
| RDB | Remote Data Base |
| RDB | Relative Data Base |
| RDB | Run Disk Backwards |
| RDB | Relation Descriptor Block |
| RDB | Resource Data Base |
| RDB | Recibo de Depósito Bancário (Portuguese: Bank Deposit Receipt; Brazil) |
| RDB | Resource Database (various organizations) |
| RDB | Rocco DeLuca and the Burden (band) |
| RDB | Rwanda Development Board |
| RDB | Revenu Disponible Brut (French: Gross Disposable Income) |
| RDB | Relational Data Base |
| RDB | Rigid Disk Block |
| RDB | Rural Development Bank |
| RDB | Research and Development Board |
| RDB | Receive Data Buffer |
| RDB | Rear Disc Brake (automobiles) |
| RDB | Regional Development Bank |
| RDB | Rare Disease Database |
| RDB | Reference Data Base |
| RDB | Radio des Boutières (French broadcasting company) |
| RDB | Rand de Basanti (actor) |
| RDB | Residential Distribution Box |
| RDB | Requirements Data Base |
| RDB | Routing Data Base |
| RDB | Ramped Dump Barge (US Navy) |
| RDB | Regional Defense Bureau (Ministry of Defense; Japan) |
| RDB | Repeat Data Base |
| RDB | Red Design Bureau |
| RDB | Ruhunu Development Bank (Sri Lanka) |
| RDB | Radiological Dispersion Bomb |