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Barcode format compatibility is maintained, because (aside from the group breaks) the ISBN-13 barcode format is identical to the EAN barcode format of existing 10-digit ISBNs. So, migration to an EAN-based system allows booksellers the use of a single numbering system for both books and non-book products that is compatible with existing ISBN ...
By utilizing the barcode's center marker, a scanner can decode an International Article Number (EAN) by scanning one half of the barcode at a time through a helical scan at a 45-degree angle. This method reconstructs the full code from partial scans, useful when the barcode is obscured or damaged.
Barcodes that encode a book's ISBN are also widely pre-printed on books, journals and other printed materials. In addition, retail chain membership cards use barcodes to identify customers, allowing for customized marketing and greater understanding of individual consumer shopping patterns.
The ISBN-13 is often found near the barcode and will start with either 978- or 979-. However, if an older work only lists an ISBN-10, use that in citations instead of calculating an ISBN-13 for it. This is because ISBNs are often used as search strings and checksum differences between the two forms make it difficult to find items listed only ...
For the end user, Code 128 barcodes may be generated by either an outside application to create an image of the barcode, or by a font-based barcode solution. Either solution requires the use of an application or an application add in to calculate the check digit and create the barcode.
In 2007, the length of an ISBN changed from 10 to 13 digits, and a new 3-digit prefix (978 or 979) was added in front of 10-digit ISBNs. [2] The following registration groups are compatible with or without a 978- prefix:
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