Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!spool.mu.edu!news.cs.indiana.edu!uceng!uceng.uc.edu
From: dsims@uceng.uc.edu (david l sims)
Newsgroups: comp.misc
Subject: VISA/MC/AMEX/DISCOVER checksum computations wanted
Keywords: checksum
Message-ID: <8549@uceng.UC.EDU>
Date: 22 May 91 01:51:58 GMT
Article-I.D.: uceng.8549
Sender: dsims@uceng.UC.EDU
Organization: College of Engineering, University of Cincinnati
Lines: 5

Someone recently asked for the checksum procedure that is used to
validate ISBN numbers.

Does anyone know the procedures to validate Visa, Mastercard, American
Express, Discover, etc card numbers?