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The International Standard Book Number is a unique numeric commercial book identifier. Publishers purchase ISBNs from an affiliate of the International ISBN Agency. An ISBN is assigned to each edition and variation of a book. For example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January 2007, and 10 digits long if assigned before 2007. The method of assigning an ISBN is nation-based and varies from country to country, often depending on how large the publishing industry is within a country. The initial ISBN configuration of recognition was generated in 1967 based upon the 9-digit Standard Book Numbering created in 1966. The 10-digit ISBN format was developed by the International Organization for Standardization and was published in 1970 as international standard ISO 2108 . Privately published books sometimes appear without an ISBN. The International ISBN agency sometimes...

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Shortcuts to chapters:
00:01:36 History
00:03:18 Overview
00:04:09 How ISBNs are issued
00:09:25 Registration group identifier
00:11:04 Registrant element
00:13:04 Pattern for English language ISBNs
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