All libraries that barcode magazines are required to enter a serial holdings record through the Polaris serials module to show the retention period of all magazines. Creation of serial holdings records is optional for libraries that do not barcode magazines. If your library uses a bibliographic record for newspapers, a serials holdings record must be created. Libraries are not required to barcode or circulate these materials. Use of the serials module is not required for serial material such as test books, travel guides, etc.