Concise Command Language (CCL) was the term used by Digital Equipment Corporation for the command-line interpreter / user interface supplied on several of their computing systems; its successor was named DIGITAL Command Language (DCL).

CCL provides the user with an extensive set of terminal commands."Concise Command Language" (CCL).

The first operating system to include CCL was DEC's TOPS-10.

History The PDP-6 monitor came with a simple set of commands. To compile and run a FORTRAN program, one would invoke the FORTRAN compiler specify binary output and source input invoke the loader, allocate 30K of memory specify binary object to load let the loader find the appropriate subroutine libraries write the executable to DTA1 (The (DOT) is a monitor prompt and the (Star/Asterisk) is an application prompt)

The PDP-10 monitor (later called TOPS-10) had CCL. Key to its improvements over its predecessor were: multi-step commands: would check to see if any of the 3 needed to be recompiled (and did so if necessary) run the object program loader (including needed subroutine libraries) start running the program advanced command file: would run the command(s) in the .CMD file

Commands The following table contains a list of CCL commands.

+List of CCL commands CCL command Description Short form Full formBACBACKSPACERuns CAMP. A magnetic tape or cassette is spaced backward a specified number of files or records. BOBOOTCCLCCLDisables the CCL program on the OS/8 Keyboard Monitor residing on the system device.COMPCOMPARERuns SRCCOM. Compares/shows differences between two source files. Although line by line, permits "catch up."COMCOMPILEProduces binary files and/or compilation listings for specified program files.COPCOPYTransfers files from one I/O device to another.CORCORECREACREATERuns EDIT and opens a new file for creation.CREFCREFDADATEDEADEASSIGNDELDELETEDeletes one or more files from disk or DECtape.DIRDIRECTEDEDITRuns EDIT. Opens an already existing file for editing.EOFEOFEXEEXECUTEHEHELPPrints information on specified OS/8 programs.LILISTLOLOADMAKMAKERuns TECO. Opens the specified file for output.MAPMAPRuns BITMAP.MUNGMUNGRuns a TECO Macro; command line parameters give added adaptability.PALPALRuns PAL8. Assembles the source file specified as the argument.PRIPRINTRuns a program named LPTSPL.PUPUNCHRuns PIP. Punches the file specified on paper tape.RENRENAMERenames one or more files on disk or DECtape.RESRESRuns RESORC.REWREWINDSKIPSKIPSQSQUISHRuns PIP's "squeeze" / defrag toolSUSUBMITRuns the BATCH program.TETECO(Text Editor and COrrector, a sophisticated text editor with MACRO capabilities). TYTYPEUAUAUBUBUCUCUNLUNLOADVERVERSIONPrints the version numbers of the OS/8 Keyboard Monitor and CCL.ZEROZERO

References