DCL

DCL or may refer to:
 * 650 in Roman numerals, see 650 (disambiguation)

Computers

 * Data Center Linux, see Open Source Development Labs
 * Data Control Language, a subset of SQL
 * Dialog Control Language, a language and interpreter within AutoCAD
 * DIGITAL Command Language, the command language used by most of the operating systems from the former Digital Equipment Corporation (DEC), now owned by Hewlett-Packard (HP)
 * Double-checked locking, a software design pattern
 * .dcl, source code files for Clean (programming language)
 * .dcl, Delphi Control Library files for Embarcadero Delphi

Military

 * Char de dépannage DNG/DCL, armoured recovery vehicle

Degrees

 * Doctor of Canon Law, for studies of canon law of the Roman Catholic Church
 * Doctor of Civil Law, an alternative to the Doctor of Laws (LL.D.) degree

Organizations

 * Data Connection Ltd, a former name of Metaswitch
 * Detroit College of Law, now known as the Michigan State University College of Law
 * Disney Cruise Line, a cruise line company (United States)

Places

 * Deep Creek Lake State Park, a Maryland state park in Garrett County, United States

Science, technology, and medicine

 * DCL Technology Demonstrator programme, a torpedo detection system (U.K.)
 * Device for Connection of Luminaires, a European plug and socket system for connecting lighting equipment
 * DICER-like, family of plant genes
 * Direct coal liquefaction
 * Deuterium chloride, DCl, a form of hydrogen chloride using deuterium atoms

Sports and games

 * Dual County League, a high school athletic conference in Massachusetts, United States
 * Drone Champions League, a drone racing league