The German software giant lured Siu, 52, from Nokia last year and put her in charge of its China operations. The market is now SAP's fastest growing: Its China sales were up 33% in the first half of 2011, and with a base of more than 4,000 customers in China, the tech industry veteran is on track to double revenues of her division within the next three years.
The full list of Fortune's annual ranking of America's leading businesswomen.
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