Steve Ballmer: A visual history
Tech geeks love to know everything about a gadget, from the casing to the hard drive to processor. We are applying this technique to tech's head honchos, such as Larry Ellison and Steve Jobs.
For this teardown slideshow, it's Microsoft CEO Steve Ballmer's turn.
Tech billionaires in the top 100 added $52.9 billion (£33 billion) to their fortunes this year, more than any other industry
Thanks to recent market gains, his portfolio was worth more than when he last sold stock.
The company said it accounted for 90 percent of mobile payments in the US last year