When I send an 'INDEX' command to "LISTSERV@MiamiU",
part of the response (which I've truncated to 79 columns) is:
 
*                             rec               last - change
* filename filetype   GET PUT -fm lrecl nrecs   date     time   File descriptio
* -------- --------   --- --- --- ----- ----- -------- -------- ---------------
 
  LISTSERV FILELIST   ALL CTL V     104    50 91/06/03 15:11:18 Lists all avail
/F/  NOTEBOOK FILELIST   NAD N/A V      95   N/A 89/09/25 17:48:39 Lists availa
/F/  INFO     FILELIST   ALL LMC V     102   105 90/07/03 14:02:27 Lists inform
/F/  TOOLS    FILELIST   ALL LMC V      97   205 90/07/03 14:02:40 Software too
/F/  CONTROL  FILELIST   ALL LMC V      96   137 91/06/03 15:11:16 Control data
/F/  UTILITY  FILELIST   ALL CTL V      82    42 89/10/24 12:25:43 Miscellaneou
 
 
Where did those "/F/" strings come from?     Thanks!