The Free On-line Dictionary of Computing (30 December 2018):

backup software

    Software for doing a backup, often
   included as part of the operating system.

   Backup software should provide ways to specify what files get
   backed up and to where.  It may include its own scheduling
   function to automate the procedure or, preferably, work with
   generic scheduling facilities.  It may include facilities for
   managing the backup media (e.g. maintaining an index of tapes)
   and for restoring files from backups.

   Examples are Unix's dump command and Windows's
   ntbackup.

   (2004-03-16)