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10. Dell
Fortune 500 rank: 34
Despite setbacks in 2007, Dell's profits rose 14% to $2.9 billion as it beefed up its laptop lineup and brokered deals with big box retailers like Wal-Mart and Best Buy. But Dell's dependence on a slow-growing U.S. market could pose problems in 2008.

NEXT: 11. Texas Instruments
Last updated April 24 2008: 11:04 AM ET