            EVF - GLOBAL EVENT FLAG MANIPULATOR
 
 
 PURPOSE: EVF is a program designed for the manipulation and
          examination of the global event flags.
 
 FEATURES: EVF accepts as input the standard file specifier,
          with  five  possible  switches.  Only the switches
          are recognized, and  the  remainder  of  the  file
          specifier is ignored.  The following is a descrip-
          tion of the switches and their functions.
 
           /ON:N[:N:...:N] -- turns on the specified event flags.
 
           /OF:N[:N:...:N] -- turns off the specified event flags.
 
           /LI[:N:...:N] -- indicates the state of the specified
                event flags.  If no switch values are given, a
                compressed listing of all the event flags is given.
 
           /LN -- lists all the eventflags which are "on".
 
           /OF -- lists all the event  flags  which  are "off".
