The next ten digits encoded in the symbol are below the bars.The first digit is the Number System Character (NSC) which appears on the left side of the symbol outside of the bars.Hyphens or spaces usually separate the elements of the The UPC appears as a barcode symbol with 12 digits printed below it. The Universal Product Code (UPC) is a barcode symbol that is used to track trade items in stores (e.g., audio and video products). Enter an OCLC number without leading zeros. OCLC assigns a unique number to each bibliographic record input into WorldCat. Thirteen-digit ISBNs must begin with either 978 or 979. An ISBN is a unique number assigned to an item by its publisher.
