DC
- DC – (i) da capo – Italian Democrazia Cristiana – Digital Compass – Direct Current – (s) District of Columbia (postal symbol) – (i) Douglas Aircraft Company – Dublin Core – Duty Cycle
- Disconnected
- DCA – (i) Defensive Counter Air – Drum Corps Associates – (p) DiChloroAcetate – (s) Ronald Reagan Washington National Airport (IATA code)
- DCAA – (i) (U.S.) Defense Contract Audit Agency
- DCAS – (i) Devon and Cornwall Archery Society
- DCC – (i) Dallas Christian College
- DCC – (i) Digital Command Control (model railroading) – Direct Client-to-Client (Internet Relay Chat) – Dismounted Close Combat
- DCCP – (i) Datagram Congestion Control Protocol
- DCD – (i) Donation after Cardiac Death
- 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
Read more about this topic: List Of Acronyms And Initialisms: D