The description below is from the book DOS the Easy Way by Everett Murdock Ph.D.
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Type: External (4.0 and later)
MEM [/program|/debug|/classify|/free|/module(name)] [/page]
Purpose: Displays the amount of installed and available memory,
including extended, expanded, and upper memory.
Used to display a variety of types of information about how your system
/program - Specifies the name, location, size, and type of each
which memory information is to be displayed (available with DOS 4.0 and
only). Cannot be used with /C or /D. This option can be abbreviated as
/debug - Specifies additional information about the programs in
This option can be abbreviated as /D.
/classify - Displays programs that are in conventional and upper
Cannot be used with /D, /F, or /M name. This option can be abbreviated
/free - Lists the free areas of conventional and upper memory. You can
/Free switch with /Page but not with other MEM options (new with DOS
This option can be abbreviated as /F.
/module modulename Shows how a program module is currently using
You must specify the program name after the /MODULE option. You can use
/MODULE option with /PAGE, but not with other MEM options (new with DOS
6). This option can be abbreviated as /M.
/page - Pauses after each screen of output. This switch can be used with
the other MEM options (new with DOS Version 6). This option can be
To display the programs that are currently in conventional and upper