Displays the amount of used and free memory in your system.

MEM [/CLASSIFY | /DEBUG | /FREE | /MODULE modulename] [/PAGE]

  /CLASSIFY or /C  Classifies programs by memory usage. Lists the size of
                   programs, provides a summary of memory in use, and lists
                   largest memory block available.
  /DEBUG or /D     Displays status of all modules in memory, internal drivers,
                   and other information.
  /FREE or /F      Displays information about the amount of free memory left
                   in both conventional and upper memory.
  /MODULE or /M    Displays a detailed listing of a module's memory use.
                   This option must be followed by the name of a module,
                   optionally separated from /M by a colon.
  /PAGE or /P      Pauses after each screenful of information.
Configures system devices.

Printer port:      MODE LPTn[:] [COLS=c] [LINES=l] [RETRY=r]
Serial port:       MODE COMm[:] [BAUD=b] [PARITY=p] [DATA=d] [STOP=s] [RETRY=r]
Device Status:     MODE [device] [/STATUS]
Redirect printing: MODE LPTn[:]=COMm[:]
Prepare code page: MODE device CP PREPARE=((yyy[...]) [drive:][path]filename)
Select code page:  MODE device CP SELECT=yyy
Refresh code page: MODE device CP REFRESH
Code page status:  MODE device CP [/STATUS]
Display mode:      MODE [display-adapter][,n]
                   MODE CON[:] [COLS=c] [LINES=n]
Typematic rate:    MODE CON[:] [RATE=r DELAY=d]