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These children deserve a space which is engaging and instructive, where they can feel a sense of adventure, exploration and surprise.

Similar functionality can be achieved with MODE CON: CP SELECT yyy.

This article presents a list of commands used by DOS operating systems, especially as used on x86 -based IBM PC compatibles (PCs).

Some commands were built into the command interpreter, others existed as external commands on disk.

Over the several generations of DOS, commands were added for the additional functions of the operating system.

In the current Microsoft Windows operating system, a text-mode command prompt window, cmd.exe, can still be used.

When an application exits, if the transient portion of the command interpreter in memory was overwritten, DOS will reload it from disk.

Some commands are internalbuilt into COMMAND.COM; others are external commands stored on disk.

When the user types a line of text at the operating system command prompt, COMMAND.COM will parse the line and attempt to match a command name to a built-in command or to the name of an executable program file or batch file on disk.

If no match is found, an error message is printed, and the command prompt is refreshed.

Such utility programs would be stored on disk and loaded just like regular application programs but were distributed with the operating system.

Copies of these utility command programs had to be on an accessible disk, either on the current drive or on the command path set in the command interpreter.

Commands that can accept only a single file name are said to accept a filename parameter.

Additionally, command line switches, or other parameter strings, can be supplied on the command line.

Spaces and symbols such as a or a - may be used to allow the command processor to parse the command line into filenames, file specifications, and other options.

The APPEND command is similar to the PATH command that tells DOS where to search for program files (files with a.COM,.

EXE, or.BAT file name extension).

It can also display drive assignments or reset all drive letters to their original assignments.

It defaults to display the attributes of all files in the current directory.

The file attributes available include read-only, archive, system, and hidden attributes.

The command has the capability to process whole folders and subfolders of files and also process all files.

These appeared in version 2, and continued to PC DOS 5 and MS-DOS 6 (PC DOS 7 had a deversioned check).

In DOS 6, these were replaced by commercial programs (CPBACKUP, MSBACKUP), which allowed files to be restored to different locations.

Implementing BASIC in this way was very common in operating systems on 8- and 16-bit machines made in the 1980s.

BASICA last appeared in IBM PC DOS 5.02, and in OS2 (2.0 and later), the version had ROM-BASIC moved into the program code.

Some OEM releases had basic.com and basica.com as loaders for GW-BASIC.EXE.

Ms Dos Technical Reference Manual