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Digital Command Language

The Digital Command Language (DCL) is a scripting language used in the OpenVMS operating system. DCL was designed for automating tasks and managing system resources on VAX minicomputers in the 1970s. The language has evolved to support more modern programming concepts but retains its original simplicity, using commands and qualifiers that resemble those found in operating systems like MS-DOS or UNIX shells. DCL incorporates conditionals, loops, procedures, and simple I/O operations that enable programmers to construct scripts for performing complex operations without having to write full-fledged programs in languages like FORTRAN or C. Commands are executed immediately upon entry unless explicitly directed otherwise through the use of control structures within script files.