The world's top 10 women bosses

IBM has named Virginia M Rometty, left, as its chief executive. She's the tech giant's ninth CEO and the first woman to get the job in the firm's 100-year history. Outgoing CEO Sam Palmisano said: "Ginni got it because she deserved it. It's got zero to do with progressive social policies." Rometty is a well-known figure in tech circles, and she's led the firm's services business for a decade. She joins a select group of female bosses of big corporations.