   Parameters:  [topic-prefix-list] [#levels {2} [pagelen {22}]]
  
 This command lists information for the topics that match "topic-
 prefix-list",  which may specify any type of topic grouping such
 as "COMMAND", "STRING", "COM ERR", or "META COM DESCRIP".  If no
 prefix is given, all topics will be listed. 
  
      Information is displayed a page at a time.  At the  end  of
 each page typed, the user is prompted with ":".  Valid responses
 are: 
  
      / - Skip past next page        = - Show current line number
      Q - Quit     ? - Show topic names requested      H - Give help
      Any other response will continue with the next page.
  
 The following list explains the command options: 
  
    #levels  - print "#levels" sub-levels of information; default is 2
    pagelen  - set page length to "pagelen" lines; default is 22
