DCA

DCA may refer to:

Computers

Agreement on Defense Cooperation between the Czech Republic and the United States of America, known as the Defense Cooperation Agreement
Agreement on Defense Cooperation between Finland and the United States of America, known as the Defense Cooperation Agreement
Defence Cyber Agency, a tri-service command of the Indian Armed Forces
Defense Communications Agency, former name of the 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

Christian Democracy for Autonomies, a former political party in Italy
DCA Design, a product design and development company based in Warwick, England
Digital Communications Associates, an American company
Distributors Corporation of America, American film distribution company (1952-1959)
Diversity Council Australia, an Australian independent not-for-profit, promoting diversity and inclusion in the workplace
Diyanet Center of America, a non-profit center funded by the Turkish Government in Lanham, Maryland, US
Drum Corps Associates, a governing body of drum corps in North America
Dublin Castle administration, Ireland
Dundee Contemporary Arts, Scotland

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

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