Oracle Export/Import (Oracle utilities)
Oracle's export and import utilities back up the data contained within an Oracle database. The RMAN/OS Oracle backups back up the entire database at the datafile/tablespace level whereas export/import backup/restore at the user/table level. An export is a good supplement to any of the above backups.
Oracle's export/import can backup/restore a Database (all users), a particular user, or a set of tables. See Oracle’s manuals for details about Oracle’s Export and Import.