     The M command will display a list of all the current users,
     how they connected, and their current activity.

     'ML'  will list all past users of the system, when they were last on
     and how many times they've connected.

     'ML n'     will show the last n users of the system
     'ML call'  will list when 'call' last logged in

     'MS'  will give some info on the number of messages handled since
     the system has been up

