1 UNIQUE
 This command procedure provides a unique file name within the system
 for command procedures needing a unique name.   Each call returns a
 new name.

 Format:

        @SYS$COM:UNIQUE  [Symbol_name]

 Results:

        The global symbol UNIQUE is set to the unique file name. If a
 global symbol name is specified, the global symbol specified AND the 
 global symbol UNIQUE are set to the unique file name.

