C)lock:  Displays the time that you have been on the system.  Entering a
"C" will display the current time and how long you have left.  RBBS-PC
restricts the amount of time you can stay on the system so that other
callers have a chance to use the system.

TIPS:  A quick reminder of time left on the system is also the "xx minutes
left" that precedes the command prompt on RBBS-PC.
