There is a limit (MAXLINE - 2) on the number of characters
        in a line. Se's MAXLINE is currently 512, so this isn't too much
        of a problem.
            If a filename is absent when invoked, all of the
        options are not processed.


        To go all the way back to the general help display, type "h".    
        To go back to the general help directory, type "hdir."