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In computing, comp is a command used on DEC OS/8,cite-ref-os8-handb-1-0[1] DOS,cite-ref-jamsa1993-2-0[2] DR FlexOS,cite-ref-3[3] IBM OS/2,cite-ref-4[4] Microsoft Windowscite-ref-5[5] and related computer operating systems such as ReactOS. It is used to perform comparisons of multiple computer files to show the differences between them.cite-ref-runningmsdos-6-0[6]

• History

• Syntax

• Parameters

• See also

• References

• Further reading

• External links

In DOS, the comp command first appeared in PC DOS 1.0cite-ref-7[7] and has been included in most versions of MS-DOS and PC DOS. A newer command, fc was added in DOS 3.3 which allows for line comparisons in addition to binary comparisons. DR DOS 6.0 also includes an implementation of the comp command.cite-ref-drdos6userguide-8-0[8]

The FreeDOS version was developed by Paul Vojta and is licensed under the MIT License.cite-ref-9[9] Ged Murphy developed the ReactOS version. It is licensed under the GNU GPL 2.cite-ref-10[10]

The command is also available in the EFI shell.cite-ref-efi-shells-and-scripting-11-0[11]

The command-syntax is:cite-ref-12[12]

• <Data1> – Location and name of the first file or set of files

• <Data2> – Location and name of the second file or set of files

• /d – Display differences in decimal format (Default is hexadecimal)

• /a – Display differences as characters

• /l – Display the number of the line, instead of the byte offset

• /n=<Number> – Compare only the specified number of lines for each file

• /c – Perform a non case-sensitive comparison

• /off[line] – Process files with the offline attribute set

• /? – Display Help

• Data comparison

• List of DOS commands

• diff

cite-note-os8-handb-11. ↑ "Concise Command Language" (CCL)."OS/8 Handbook" (PDF). April 1974. Retrieved 28 November 2017.

cite-note-jamsa1993-22. ↑ citerefjamsa1993Jamsa, Kris A. (1993), DOS: The Complete Reference, Osborne McGraw-Hill, p. 206, ISBN 0078819040.

cite-note-33. ↑ http://www.bitsavers.org/pdf/digitalResearch/flexos/1073-2003_FlexOS_Users_Guide_V1.3_Nov86.pdf Archived 2019-09-25 at the Wayback Machine

cite-note-44. ↑ "OS/2 Commands". www.jatomes.com. Archived from the original on 2019-04-14. Retrieved 2019-07-20.

cite-note-55. ↑ "Comp".

cite-note-runningmsdos-66. ↑ citerefwolverton2003Wolverton, Van (2003). Running MS-DOS Version 6.22 (20th Anniversary Edition), 6th Revised edition. Microsoft Press. ISBN 0-7356-1812-7.

cite-note-77. ↑ http://www.bitsavers.org/pdf/ibm/pc/dos/6172220_DOS_1.0_Jan82.pdf

cite-note-drdos6userguide-88. ↑ "DR DOS 6.0 User Guide Optimisation and Configuration Tips" (PDF). Archived from the original (PDF) on 2019-09-30. Retrieved 2019-08-13.

cite-note-99. ↑ "FreeDOS 1.2 Updates Package - comp (FreeDOS Base)". Ibiblio.org. 2006-10-21. Retrieved 2022-09-04.

cite-note-1010. ↑ "Reactos/Reactos". GitHub. 3 January 2022.

cite-note-efi-shells-and-scripting-1111. ↑ "EFI Shells and Scripting". Intel. Retrieved 2013-09-25.

cite-note-1212. ↑ MS-DOS and Windows command line comp command

• citerefcooper2001Cooper, Jim (2001). Special Edition Using MS-DOS 6.22, Third Edition. Que Publishing. ISBN 978-0789725738.

• citerefdyson1995Dyson, Peter (1995). Mastering OS/2 Warp. Sybex. ISBN 978-0782116632.

• citerefstanek2008Stanek, William R. (2008). Windows Command-Line Administrator's Pocket Consultant, 2nd Edition. Microsoft Press. ISBN 978-0735622623.

Wikibooks has a book on the topic of:

Guide to Windows Commands

• comp | Microsoft Docs