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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.cite-ref-os8-handb-1-0[1]

The first operating system to include CCL was DEC's TOPS-10.cite-ref-pclark-2-0[2]

• History

• Commands

• References

The PDP-6 monitor came with a simple set of commands. To compile and run a FORTRAN program, one would

• .R F4 --- invoke the FORTRAN compiler

• *DTA1:PROG3=DTA2:PROG3,SUB3A,SUB3B --- specify binary output and source input

• .R LOADER 30 --- invoke the loader, allocate 30K of memory

• *DTA1:PROG3 --- specify binary object to load

• *SYS:/S --- let the loader find the appropriate subroutine libraries

• .SAVE DTA1:PROG3 --- write the executable to DTA1

(The DOT is a monitor prompt and the Star/Asterisk is an application prompt)

The PDP-10 had CCL. Key to its improvements over its predecessor were:cite-ref-pclark-2-1[2]

• multi-step commands: .EX PROG3,SUB3A,SUB3B

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: .EX @RUNPROG3.CMD

would run the command(s) in the .CMD file

The following table contains a list of CCL commands.cite-ref-os8-handb-1-1[1]

| CCL command (full form) | CCL command (short form) | Description |

|---|---|---|

| BACKSPACE | BAC | Runs CAMP. A magnetic tape or cassette is spaced backward a specified number of files or records. |

| BOOT | BO | |

| CCL | CCL | Disables the CCL program on the OS/8 Keyboard Monitor residing on the system device. |

| COMPARE | COMP | Runs SRCCOM. Compares/shows differences between two source files. Although line by line, permits "catch up." |

| COMPILE | COM | Produces binary files and/or compilation listings for specified program files. |

| COPY | COP | Transfers files from one I/O device to another. |

| CORE | COR | |

| CREATE | CREA | Runs EDIT and opens a new file for creation. |

| CREF | CREF | |

| DATE | DA | |

| DEASSIGN | DEA | |

| DELETE | DEL | Deletes one or more files from disk or DECtape . |

| DIRECT | DIR | |

| EDIT | ED | Runs EDIT. Opens an already existing file for editing. |

| EOF | EOF | |

| EXECUTE | EXE | |

| HELP | HE | Prints information on specified OS/8 programs. |

| LIST | LI | |

| LOAD | LO | |

| MAKE | MAK | Runs TECO. Opens the specified file for output. |

| MAP | MAP | Runs BITMAP. |

| MUNG | MUNG | Runs a TECO Macro; command line parameters give added adaptability. |

| PAL | PAL | Runs PAL8. Assembles the source file specified as the argument. |

| PRINT | PRI | Runs a program named LPTSPL. |

| PUNCH | PU | Runs PIP. Punches the file specified on paper tape . |

| RENAME | REN | Renames one or more files on disk or DECtape. |

| RES | RES | Runs RESORC. |

| REWIND | REW | |

| SKIP | SKIP | |

| SQUISH | SQ | Runs PIP's "squeeze" / defrag tool |

| SUBMIT | SU | Runs the BATCH program. |

| TECO | TE | (Text Editor and COrrector, a sophisticated text editor with MACRO capabilities). |

| TYPE | TY | |

| UA | UA | |

| UB | UB | |

| UC | UC | |

| UNLOAD | UNL | |

| VERSION | VER | Prints the version numbers of the OS/8 Keyboard Monitor and CCL. |

| ZERO | ZERO | |

cite-note-os8-handb-11. ↑ "Concise Command Language" (CCL)."OS/8 Handbook" (PDF). Digital Equipment Corporation. April 1974. Retrieved 1 May 2024.

cite-note-pclark-22. ↑ citerefpeter-clark1982Peter Clark (July 1982). "DEC TIMESHARING (1965)". The DEC Professional. p. 34.