1.   $ HELP

        HELP
          .
          .  (HELP message text and list of topics)
          .
        Topic?

   Issuing the  HELP  command  without  any  qualifiers  or  parameters
   produces  a  display of the HELP topics available from the root HELP
   library, SYS$HELP:HELPLIB.HLB.

   If you type one of the listed  topics  in  response  to  the  Topic?
   prompt,  HELP  displays  information  about that topic and a list of
   subtopics (if there are any).  If one or more subtopics exist,  HELP
   will prompt you for a subtopic.
        Topic? ASSIGN
        ASSIGN
          .
          .  (HELP message text and subtopics)
          .
        ASSIGN Subtopic?

   If you type a subtopic name, HELP displays  information  about  that
   subtopic:
        ASSIGN Subtopic? Name
        ASSIGN
          Name
          .
          .  (HELP message text and subtopics, if any)
          .
        ASSIGN Subtopic?

   If one or more sub-subtopics exist,  HELP  will  prompt  you  for  a
   sub-subtopic;  otherwise, as in the above example, the facility will
   prompt you for another subtopic  of  the  topic  you  are  currently
   inspecting.

   Typing a question mark will redisplay the HELP message  and  options
   at  your  current level.  Pressing the Return key will either:  (1) move you
   back to the previous HELP level if you are in a subtopic  level,  or
   (2)  terminate  HELP if you are at the first level.  Pressing Ctrl/Z
   terminates HELP at any level.

   2.   $ HELP FILL

        Sorry, no documentation on FILL

        Additional information available:
         .
         .  (list of first-level topics )
         .
        Topic? @EDTHELP FILL
        FILL
         .
         .  (FILL HELP message)
         .

        @EDTHELP Topic?

   When you issue a request for HELP on a topic  that  is  not  in  the
   default  HELP  library, you can instruct HELP to search another HELP
   library for the  topic.   In  this  example,  entering  the  command
   @EDTHELP   FILL   instructs   HELP   to   search  the  HELP  library
   SYS$HELP:EDTHELP.HLB for information on FILL, an EDT editor command.
   HELP  displays  the  message  and prompts you for another EDT editor
   topic.