Computers
- Dialog Control Language, a language and interpreter within AutoCAD
- Double-checked locking, a software design pattern
- .dcl, project files for Clean (programming language)
- .dcl, Delphi Control Library files for Embarcadero Delphi
- 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)
- Data Center Linux, see Open Source Development Labs
- DCL (Linux distribution), a Puppy Linux derivative
- Data Control Language, a subset of SQL
- Data Connection Library, see Excel Services
Read more about this topic: DCL