ISBN barcode

Book publishers


The number that appears in the barcode on a book is a special type of 13-digit number called an ISBN (International Standard Book Number). An ISBN is assigned to each edition and variation (except reprintings) of a book, so that an e-book, a paperback, and a hardcover edition of the same book each have a different ISBN. As ISBNs were invented before the GS1 barcode system, the GS1 system uses the prefix 978 or 979 to convert them into valid 13-digit barcode numbers.


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