DCB

DCB may stand for:
 * Dame Commander of the Order of the Bath
 * Development Credit Bank, a private-sector bank in India
 * David Campbell Bannerman (born 1960), a British politician
 * David Crowder Band, a Christian rock band
 * Dictionary of Canadian Biography
 * Dulwich College Beijing, a British international school in Beijing, China
 * Dope Circle Boyz, a Finnish hip-hop group

In science and technology

 * Disconnecting circuit breaker, a high-voltage circuit breaker with disconnectors integrated into the breaking chamber
 * Data center bridging, in computer networking
 * Data Control Block, a data structure for accessing data sets on IBM mainframes
 * Double Cantilever Beam, a test specimen in fracture mechanics
 * Dichlorobenzene
 * Digital Control Bus, a proprietary MIDI-like interface by Roland Corporation
 * Direct Copper Bonding, also Direct Bonding Copper, a type of power electronic substrate
 * Direct Carrier Billing, a method of doing digital financial transactions
 * Dithionite-Citrate-Bicarbonate method used for iron oxide removal from clays in soil science