Notes on geometric weighted check digit verfication

By J. G. Wilson

Communications of the ACM, Vol. 4 No. 12, Pages 551-552
10.1145/366853.366880

This note describes a method for utilizing geometric weight modulus 11 checking digits on a computer which does not have either multiplication or division. In addition some attempt has been made to show some limitations of this system.

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Notes on geometric weighted check digit verfication

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