DCA

DCA may refer to:

Computers

 * Document Content Architecture, an IBM document standard
 * Dynamic Channel Allocation/Assignment, in wireless networks
 * DTS Coherent Acoustics in DTS (sound system)

Military

 * Defence Cyber Agency, a tri-service command of the Indian Armed Forces
 * Defense Communications Agency, former name of US Defense Information Systems Agency
 * Defensive counter air (Défense contre les aéronefs), French term for air defense
 * Deputy Commandant for Aviation, principal advisor on all aviation matters in the United States Marine Corps
 * Dual-capable aircraft, used in nuclear sharing

Organizations

 * California Department of Consumer Affairs
 * Department for Constitutional Affairs of the UK government, 2003-2007
 * DCA Design
 * Department of Civil Aviation (Australia)
 * Department of Civil Aviation (Thailand)
 * Digital Communications Associates, US company
 * Diyanet Center of America, Lanham, Maryland
 * Drum Corps Associates, a governing body of drum corps in North America
 * Dundee Contemporary Arts, Scotland
 * Namibia Directorate of Civil Aviation
 * Christian Democracy for Autonomies, a former political party in Italy

Science and technology

 * Detrended correspondence analysis, a statistical technique
 * Dichloroacetic acid / dichloroacetate, an organic acid
 * Dichloroethanes, organic solvents
 * Digitally-controlled amplifier
 * Direct coupling analysis, a method for analyzing sequence data in computational biology
 * Directional component analysis, a multivariate statistical technique used in the atmospheric sciences
 * Drone congregation area, a location where bees gather to mate

Television, film, and music

 * Distributors Corporation of America, American film distribution company (1952-1959)

Transportation

 * Ronald Reagan Washington National Airport, Arlington County, Virginia, US, IATA code
 * Dutch Caribbean Airlines, former Netherlands Antilles airline

Other uses

 * Direct corporate access, part of UK Faster Payments Service
 * Dollar cost averaging, an investment strategy
 * Disney California Adventure, Anaheim, California, US
 * Debt Collection Agency, companies specialized in pursuing payments of debts