Some articles on isbn, isbns, digit, check digit, digits, isbn check digit:
... The 2005 edition of the International ISBN Agency's official manual covering some ISBNs issued from January 2007, describes how the 13-digit ISBN ... The calculation of an ISBN-13 check digit begins with the first 12 digits of the thirteen-digit ISBN (thus excluding the check digit itself) ... Each digit, from left to right, is alternately multiplied by 1 or 3, then those products are summed modulo 10 to give a value ranging from 0 to 9 ...
... The check digit for ISBN is found as the result of taking modulo 11 ... Since this could give 11 possible results, the digit "X" is used in place of "10" ...
Famous quotes containing the words digit and/or check:
“Bless my soul, Sir, will you Britons not credit that an American can be a gentleman, & have read the Waverly Novels, tho every digit may have been in the tar-bucket?”
—Herman Melville (18191891)
“The formation of an oppositional world view is necessary for feminist struggle. This means that the world we have most intimately known, the world in which we feel safe ... must be radically changed. Perhaps it is the knowledge that everyone must change, not just those we label enemies or oppressors, that has so far served to check our revolutionary impulses.”
—Bell (c. 1955)