Syntax:

      /LIST [=file-specification]
      /NOLIST

  Use /LIST to create a  listing  of  the  dictionary  directories  and
  objects  in  a  backup file.  If you specify a path name and a backup
  file, BACKUP/LIST creates the backup file and the listing  file.   If
  you  do not specify a path name, BACKUP/LIST creates a listing from a
  specified, already existing backup file.

  The listing file contains a sentence  indicating  whether  protection
  and history list information is part of the backup file.  The rest of
  the listing file resembles the output of a LIST/BRIEF command.

  Specify a standard VMS file name for the listing file.   The  default
  file  type  is .LIS.  If you do not specify a listing file, DMU sends
  the output to SYS$OUTPUT.

  Use /NOLIST to prevent the creation of a listing  file.   /NOLIST  is
  the default.

  Do not use /LIST with  /LOG  if  the  output  for  both  is  sent  to
  SYS$OUTPUT.  If you do, DMU produces confusing output.