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A UPC barcode. The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an "odd" parity form, which enables ...
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Some publishers, such as Ballantine Books, would sometimes use 12-digit SBNs where the last three digits indicated the price of the book; [12] for example, Woodstock Handmade Houses had a 12-digit Standard Book Number of 345-24223-8-595 (valid SBN: 345-24223-8, ISBN: 0-345-24223-8), [13] and it cost US$5.95.
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In addition to identifying (a particular edition of) a book, ISBNs allow one to search for the book, both at libraries and bookstores. You can enter an ISBN on this Wikipedia ISBN search page. Spaces and hyphens in the ISBN do not matter. ISBN links, or the ISBN search, take users to a special book source page, Wikipedia:Book sources.
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:
The Global Trade Item Number (GTIN) is an identifier for trade items, developed by the international organization GS1. [1] Such identifiers are used to look up product information in a database (often by entering the number through a barcode scanner pointed at an actual product) which may belong to a retailer, manufacturer, collector, researcher, or other entity.
These sites allow you to search the catalogs of many individual booksellers: Find this book on AbeBooks (Mostly used and out-of-print books. Large number of listings.) Find this book at Addall which searches multiple book sellers; Find this book on Alibris (Used books, out of print books, etc. A network of independent booksellers.