5. EMC Corp.

Headquarters: Hopkinton Sector: Technology Symbol / Exchange: EMC / New York Employees: 37,700 RANK 4/100 Chief executive: Joseph M. Tucci Market value: $30.12 billion RANK 2/100 2007 revenue: $13.23 billion RANK 4/100 2007 net income: $1.67 billion RANK 2/100 On the net: emc.com

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