Editing CLS (command) (section)

==History==
The command is available in [[MS-DOS]] versions 2 (1983) and later.<ref name="RUNNINGMSDOS">{{Cite book|author-last=Wolverton|author-first=Van|title=Running MS-DOS Version 6.22 (20th Anniversary Edition), 6th Revised edition|date=2003|publisher=[[Microsoft Press]]|isbn=0-7356-1812-7}}</ref> While the ultimate origins of using the three-character string <code>CLS</code> as the command to clear the screen likely predate [[Microsoft]]'s use, this command was present before its MS-DOS usage, in the embedded ROM [[BASIC]] dialects Microsoft wrote for early [[8-bit]] [[microcomputer]]s (such as [[TRS-80]] [[Color BASIC]]), where it served the same purpose. The MS-DOS dialects of BASIC written by Microsoft, [[BASICA]] and [[GW-BASIC]], also have the <code>CLS</code> command as a BASIC keyword  - as do various non-Microsoft implementations of BASIC such as [[Sinclair BASIC]] (1980), or [[BBC BASIC]] found on the [[BBC Micro]] computers (1981). The <code>CLS</code> command is also present in BASIC versions for Microsoft Windows, however this generally clears text printed on the form, rather than the whole window or controls on the form.

The command <code>CLS</code> has appeared as a clear screen command in many other BASIC dialects and command line interpreters, because of its familiarity through being included in MS-DOS.

[[The Software Link]]'s [[PC-MOS]] includes an implementation of <code>CLS</code>.<ref>[https://github.com/roelandjansen/pcmos386v501/blob/master/DOCS/v4/PCMOSv4UserManual.pdf PC-MOS User Guide]</ref> Like the rest of the operating system, it is licensed under the [[GPL v3]].<ref>{{cite web|url=https://github.com/roelandjansen/pcmos386v501|title=pcmos386v501: PC-MOS/386 v5.01 final release including cdrom driver sources|first=Roeland|last=Jansen|date=8 February 2018|via=GitHub}}</ref>

[[DR DOS]] also includes an implementation of the {{code|CLS}} command.<ref name="drdos6userguide">{{Cite web |url=https://www.4corn.co.uk/archive/docs/DR%20DOS%206.0%20User%20Guide-opt.pdf |title=DR DOS 6.0 User Guide Optimisation and Configuration Tips |access-date=2019-08-13 |archive-url=https://web.archive.org/web/20190930135943/http://www.4corn.co.uk/archive/docs/DR%20DOS%206.0%20User%20Guide-opt.pdf |archive-date=2019-09-30 |url-status=dead }}</ref>