MEM 								[new DOS 4.0]
or
MEM /DEBUG
or
MEM /PROGRAM

This external command displays information about the total memory on the
computer, how much memory is available for use, and the largest program 
that will "fit" into that memory. For earlier versions of DOS, the CHKDSK
command can be used to display information about the total memory on the
computer.

/PROGRAM requests a list of programs presently in memory.

/DEBUG requests a /PROGRAM list plus device drivers. A Device driver is
    put in memory by a DEVICE line in the CONFIG.SYS file.

The display for a /PROGRAM or /DEBUG list includes the starting address 
(in hexadecimal -- base 16), name, size in characters, and type of item 
found at each address.
