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Widening market share in data storage EMC Corp. widened its lead as the world's top seller of data storage computers over Hewlett-Packard Co. and International Business Machines Corp. in the second quarter, researcher Gartner Inc. said. In the second quarter, EMC's sales of the machines that organize and retrieve data rose to 23.1 percent of the worldwide market, or \$745.6 million, from 20.6 percent a year ... 