RDB or RdB stands for:
- Régional des Brenets, a former, in the transport Régionaux Neuchâtelois ( TRN) integrated, Swiss railway company
- Council of Mayors in Berlin, a panel on the participation of districts in issues of administration and legislation
- Reactor pressure vessel, the vessel is in nuclear power plants, in which the heat -generating reactor core with fuel elements
- Red Dog Airport, the IATA code of the airport in Alaska, USA
- Reich Association of German officials, the former name of " Dbb beamtenbund and tarifunion "
- Relational database, is used for electronic data management in computer systems
- Reptile Database, an online database of systematic information about reptiles
- The DBMS Oracle Rdb, a relational database for the OpenVMS operating system
- Ring German mining engineers, the professional association of engineers, technicians and managers in the German raw material extraction and refinement in Germany
- Legal database, an Austrian digital collection of legal periodicals, comments and manuals issued by the Manz publishing and university bookstore.