External DOS Commands

DocumentID: 659262
Revision Date: 29-Feb-96 8:29:48 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Solutions: External commands are, in short, the files that come on the DOS diskettes that have .EXE or .COM extensions. They are called "external" commands because they are separate from COMMAND.COM, which houses the "internal" commands. While internal commands are contained in a single master program, the external commands are externally bundled programs. External commands are commands considered too large to have been incorporated into COMMAND.COM or which are not used frequently enough to justify their inclusion. External commands usually perform more complex tasks than internal commands, such as formatting a disk and backing up the hard drive. Technically, any file with a .EXE or .COM extension is an external command, but any such file not shipped with DOS is commonly referred to as a program, utility, or application. Many commercial products are available that include utilities to complement or, in some cases, replace their DOS-bundled counterparts. The most commonly used DOS external commands are FORMAT, CHKDSK, BACKUP, RESTORE, MODE, PRINT, SUBST, and XCOPY.

Answer:

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