– (i) (U.S.) Defense Contract Audit Agency DCAS – (i) Devon and Cornwall Archery Society DCC (i) Dallas Christian College Digital Command Control (model railroading) Direct Client-to-Client (Internet Relay Chat) Dismounted Close Combat DCCP – (i) Datagram Congestion Control Protocol DCD – (i) [Organ] Donation after Cardiac Death DCDC – Development, Concepts and Doctrine Centre DCE – (i) Data Communication Equipment DCFC – (i) Death Cab for Cutie DCI (i) Detection, Classification and Identification Drum Corps International Duellists' Convocation International, now known simply by the initials DCIM – (p) Digital Camera Images DCIMS (i) Dental Classification Information Management System Dismounted Combat Identification Marking System DCL – Disney Cruise Line DCN – Deacon DCOM – Disney Channel Original Movie DCOP – (i) Desktop Communication Protocol DCSOPS – (p) Deputy Chief of Staff for Operations and plans DCW – (i) Digital Chart of the World DCYSC – (i) Discovery Channel Young Scientist Challenge DD DD – many, including due diligence and dear daughter (increasingly prevalent on social mailing lists, blogs, and bulletin boards); see entry - Dunkin Donuts D&D (i) Dungeons and Dragons Diversion and Distress (Air Traffic Control) DDA (i) Digital Differential Analyzer (graphics algorithm) Digital Differential Analyzer Deputy District Attorney DDD (i) Data Display Debugger Digital Digital Digital (CD mastering) DDL – (i) Digital Data Link DDN – (i) U.S. Defense Data Network DDoS – (i) Distributed Denial of Service DDP (i) Danish Design Prize Deutsche Demokratische Partei (German, "German Democratic Party" – former political party in Weimar Germany) Diamond Dallas Page (American professional wrestler) DDR (i) Dance Dance Revolution Deutsche Demokratische Republik (German, "German Democratic Republic" (GDR), East Germany) Double Data Rate (s) East Germany (ISO 3166 trigram, obsolete since 1990) DDR&E – (i) (U.S.) Defense Department Research and Engineering DDS – (i) Doctor of Dental Surgery DDT (i) Dichloro-Diphenyl-Trichloroethane (insecticide) Dramatic Dream Team, the original name of the Japanese professional wrestling promotion DDT Pro-Wrestling Dynamic Debugging Tool (computing) DE de – (s) German language (ISO 639-1 code) DE – (s) Delaware (postal symbol) – Germany (ISO 3166 digram) DEA – (i) Drug Enforcement Administration DEA – (i) Drug Enforcement Agency DEC (a/i) Department of Environmental Conservation Digital Equipment Corporation Disasters Emergency Committee DeCA – (p) (U.S.) Defense Commissary Agency DECSIM – (p) Model DEComposition and SIMulation algorithm – Directed Energy Combat SIMulation DECT – (a) Digital European Cordless Telephone DEERS – (a) Defense Enrollment Eligibility Reporting System (US