DOS Command Expand
Type: External (5.0 and later)
Syntax:
EXPAND [d:][path]filename [[d:][path]filename[ . . .]]
Purpose:
Expands a compressed file.
Discussion
This command can be used to expand compressed files. In fact,
several of the files on the DOS 6 Setup disks cannot be used unless
you expand them.
If you use the following syntax:
expand [d:][path]filename
a prompt will be displayed asking you to enter a name and a location
for the expanded file. If you only enter
expand
you will be prompted to enter the location and name for the file you
want to expand as well as the location and a name for the expanded
file.
Example
To retrieve the SORT.EX file from MS-DOS 6.2 Setup disks and save
the expanded file as SORT.EXE in the DOS directory on drive C, first
locate the disk that contains the SORT.EXE file and insert it in
drive A. Then, enter the following:
expand a:\sort.ex
c:\dos\sort.exe
This page is from http://www.easydos.com. I pasted it on my website to avoid possible broken links. For further help with DOS commands, Check easydos.com out.