Apple is Now a Mobile Company

The iPhone now is Apple's biggest business, and it was a "zero" revenue contributor three years ago. Where Apple had fourth-quarter 2009 Mac revenue of $4.5 billiion, it had iPhone revenue of $5.6 billion, up 90 percent year over year. The iPod contributed $3.4 billion in revenue.

Even if one assumes no Mac revenue is attributable to portable devices, iPhone and iPod revenue from fully mobile devices amounts to $9 billion out of a total $13.5 billion in quarterly revenue, or two thirds of total.