Developer(s) | DEC, Microsoft, IBM, TSL, DR, Novell, Toshiba, ReactOS Contributors |
---|---|
Operating system | RT-11, DOS, MSX-DOS, FlexOS, PC-MOS, SISNE plus, OS/2, Windows, ReactOS, SymbOS, DexOS |
Platform | Cross-platform |
Type | Command |
License | PC-MOS:
GPL v3 ReactOS: GPL v2 |
In
computing, CLS
(for clear screen) is a
command used by the
command-line interpreters
COMMAND.COM
and
cmd.exe
on
DOS,
Digital Research
FlexOS,
[1]
IBM
OS/2,
[2]
Microsoft Windows
[3] and
ReactOS
operating systems to clear the screen or
console window of commands and any output generated by them. It does not clear the user's
history of commands, however.
The command is also available in the
DEC
RT-11 operating system, in the
open-source
MS-DOS
emulator
DOSBox and in the
EFI shell.
[4] In other environments, such as
Linux and
Unix, the same functionality is provided by the
clear
command.
The command is available in
MS-DOS versions 2 (1983) and later.
[5] While the ultimate origins of using the three-character string CLS
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
microcomputers (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 CLS
command as a BASIC keyword - as do various non-Microsoft implementations of BASIC such as
BBC BASIC found on the
BBC Micro computers (1981). The CLS
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 CLS
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 CLS
.
[6] Like the rest of the operating system, it is licensed under the
GPL v3.
[7]
DR DOS also includes an implementation of the CLS
command.
[8]
Developer(s) | DEC, Microsoft, IBM, TSL, DR, Novell, Toshiba, ReactOS Contributors |
---|---|
Operating system | RT-11, DOS, MSX-DOS, FlexOS, PC-MOS, SISNE plus, OS/2, Windows, ReactOS, SymbOS, DexOS |
Platform | Cross-platform |
Type | Command |
License | PC-MOS:
GPL v3 ReactOS: GPL v2 |
In
computing, CLS
(for clear screen) is a
command used by the
command-line interpreters
COMMAND.COM
and
cmd.exe
on
DOS,
Digital Research
FlexOS,
[1]
IBM
OS/2,
[2]
Microsoft Windows
[3] and
ReactOS
operating systems to clear the screen or
console window of commands and any output generated by them. It does not clear the user's
history of commands, however.
The command is also available in the
DEC
RT-11 operating system, in the
open-source
MS-DOS
emulator
DOSBox and in the
EFI shell.
[4] In other environments, such as
Linux and
Unix, the same functionality is provided by the
clear
command.
The command is available in
MS-DOS versions 2 (1983) and later.
[5] While the ultimate origins of using the three-character string CLS
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
microcomputers (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 CLS
command as a BASIC keyword - as do various non-Microsoft implementations of BASIC such as
BBC BASIC found on the
BBC Micro computers (1981). The CLS
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 CLS
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 CLS
.
[6] Like the rest of the operating system, it is licensed under the
GPL v3.
[7]
DR DOS also includes an implementation of the CLS
command.
[8]