          +---------------------------------------------------------+
           System Sleep (v2.5 1/12/92) Copyright (c) OzWoz 1988-92 
          +---------------------------------------------------------+

                       Usage: sleep hh:mm[:ss:hd] [/!PK]

Sleeps for the time specified then exits. If sleeping terminates normally
then an exit code of 0 is returned else 1. Switches are interpreted as:

/! - Display general program and OzWoz information.
/P - No message display
/K - No abort by keypress allowed
