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13. International Business Machines
Fortune 500 rank: 15
2007 profit: $10.42 billion

Profit at the technology-services giant climbed 10% during 2007, driven by software sales.

A series of software company acquisitions made since 2003 added to IBM's revenue.

Growth in Asia and emerging markets also drove 2007 results.

NEXT: Procter & Gamble

Last updated April 24 2008: 11:07 AM ET