ISBN is the abbreviation of International Standard Book Number, which is an international number specially designed for identifying books and other documents. ISBN is to books what ID numbers are to people. There are not the same people, but there will be countless books at a time.

The new ISBN has been implemented since June 65438+1 October1. The new ISBN consists of 13 digits and is divided into five sections, that is, the 3-digit EAN (European Commodity Number) book product code "978" is added before the original 10 digit. ISBN can be used as the retrieval field of online bibliography, thus adding a retrieval way for users.

Extended data:

ISBN inspection method

According to ISO-2 108, the parity bit generation is calculated by the coefficient 1 1. The calculation method is to multiply the first nine digits of ISBN by numbers from 10 to 2 in turn, add the products, and divide the sum by11;

If there is no remainder, the check number is "0"; If there is a remainder, subtract it from 1 1 and the difference is the check number. If the difference is 10, it is represented by an "x" representing the Roman numeral 10.

ISBN is used in textbooks, printed matter, micro-reproduction, educational television or movies, mixed media publications, microcomputer software, atlases and maps, Braille publications and electronic publications.

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