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1. Ginni Rometty
Ginni Rometty
President and CEO
IBM
2011 rank: 7
Age: 55
A 31-year IBM veteran, Rometty has been a key supporting player in some of Big Blue's biggest transformations: She managed the $3.5 billion PwC Consulting acquisition that launched IBM in the services business, and with chairman Sam Palmisano worked to develop the five-year growth plan. As CEO, she's now in charge of delivering on it.
From the October 8, 2012 issue
13 global newcomers

These additions to the International Power 50 are women on the rise

Fortune's Most Powerful Women
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How we pick the Power 50
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the woman's business in the global economy, the health and direction of the business, the arc of the woman's career (resume and runway ahead), and societal and cultural influence.
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