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International Standard Book Numbers

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jawahar syed

on 1 October 2012

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Transcript of International Standard Book Numbers

By Jawahar Syeda
Andrea Rivas
Kerita De Boer The International Standard Book
Numbers (ISBN) Lets Calculate.. Using X? Sometimes the only choice for a check number will be 10. Since this is
a two digit number and cannot be used as such, the Roman numeral 10,
the symbol X, is used. Conclusion What are ISBN Numbers? The ISBN is a unique numeric commercial book identifier based upon 9-digit standard book numbering code created by Gordon Foster. Here is an ISBN number
0-205-12669-3 0 indicates the book is written in English, 205 indicates the publisher
and 12669 indicates book published by the publisher. The last digit is chosen in following way.. Each digit is given a weight by using digits from 1-10 and counting left to right, then these weights are added. 0 (10) + 2 (9) + 0 (8) + 5 (7) + 1 (6)+ 2 (5) + 6 (4) + 6 (3) + 9 (2) + ___ (1) The check digit is chosen to be a number from 0 to 10 so that this weighted sum is a multiple of 11. That is, the sum must be divisible by 11. = 0 + 18 + 0 + 35 + 6 + 10 + 24 + 18 + 18
= 129 The check digit 3 was chosen because 129 + 3(1) = 132 and 132 is a multiple of 11. 129 is greater than 11(11) = 121 and 14 less than 11(13) = 143. The only possible number from 0 to 10 to use as a check digit is 3. Bibliography This system for assigning the last
number of an ISBN number makes it
possible to detect errors made by
writing a single digit incorrectly or
by writing a pair of digits in the
wrong order, since we know what
each number indicates. mathforum.org
Google images
dret.net/glossary History.. In 1965, W. H. Smith (the largest single book retailer in Great Britain) announced his plans to move to a computerized warehouse in 1967 and wanted a standard numbering system for books it carried. BPA devised the Standard Book Numbering (SBN) system in 1966 and it was implemented in 1967.At the same time, the International Organization for Standardization (ISO) Technical Committee on Documentation set up a working party to investigate the possibility of adapting the British SBN for international use. A meeting was held in London. As a result of the thinking at all of these meetings, the International Standard Book Number (ISBN) was approved as an ISO standard in 1970 Method Multiply each digit, beginning with the leftmost digit, by the numbers 1 through 10, counting down from 10. Add the weighted products together. Divide the final sum by 11 the number required to make the final sum equally divisible by 11 is the check digit. When required number is 10, X is used. Transposition Errors The most common typing mistake we make is switching 2 digits in a number. The chief advantage of the ISBN scheme is that any transposition error will be detected by the check digit. Say that a book with number ISBN 91 - 21 - 06534 - 9 was mistyped as ISBN 91 - 21 - 06354 - 9 As a check on the typing accuracy, the check digit would be recalculated. 9×10 + 1×9 + 2×8 + 1×7 + 0×6 + 6×5 + 3×4 + 5×3 + 4×2
= 90 + 9 + 16 + 7 + 0 + 30 + 12 + 15 + 8
= 187 The check digit for 187 is 0 and not 9. So, this typing error is detected and the typist would be asked to retype the number.
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