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| Software Failure | | Data Communication | | In April of 1998 a major U.S. data communications network failed for 24 hours, crippling a large part of some U.S. credit card transaction authorisation systems as well as other large U.S. bank, retail and government data systems. The cause was eventually traced to a software bug | | Stock trading | | The computer system of a major online U.S. stock trading service failed during trading hours several times over a period of days in February of 1999 according to nationwide news reports. The problem was reportedly due to bugs in a software upgrade intended to speed online trade confirmations |
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