Filenames used by the QWK files

  BBSID.QWK is an archive containing the files from the message door being
  sent to the caller.

   MESSAGES.DAT
     A file containing the messages themselves in 128 byte records.

   CONTROL.DAT
     A file with info on the system, caller, and conference names and
     numbers.

   999.NDX
     One file for each selected conference that contains pointers to the
     messages in MESSAGES.DAT There are usually several *.NDX files in each
     QWK file.  (Right justified, padded with leading zeros to make the 3
     characters).

   PERSONAL.NDX
     An optional file that is in the same format as the other *.NDX files
     except that it contains index records for all messages to the caller
     regardless of which conference they were in.

   NEWFILES.DAT
     An optional file that contains a list of new files from the Bbs.

   BLT-0.99
     Optional files containing ascii or ansi bulletins.  The 99 extension
     is replaced by the bulletin number (Left justified not padded).

   DOOR.ID
     An optional text file that contains info on the capabilities of the
     door that produced the QWK packet (so that the reader will only send
     control messages that can be handled).

   SESSION.TXT
     An optional ascii/ansi file containing info on the activity occuring
     in the mail door.

  Optionally it may also contain ascii or ansi screens for Welcome, News,
  and Goodbye as named in the CONTROL.DAT file.


 Filenames used by the .REP files
   BBSID.REP is an archive containing a single file of the messages sent
   from the caller to the Bbs.

   BBSID.MSG
     A file containing the messages themselves in 128 byte records.  The
     format is similar to MESSAGES.DAT.