• Business Insider, Thursday, April 22, 2010 3 PM

Apple's iPhone business now represents a whopping 40% of the company's revenue, according to Business Insider's "chart of the day." Remarkably, that's a share of the business that didn't exist three years ago. Now, for three quarters and counting, the iPhone is Apple's biggest revenue generator. During the March quarter, iPhone revenue grew 124% year-over-year to $5.4 billion -- or 40% of Apple's $13.5 billion in total revenue.

"Because of high profit margins on the iPhone, it's likely Apple's biggest profit contributor, too," suggests Business Insider. "But that's another chart. Apple's second-biggest business is its Mac computer division, which grew 27% year-over-year in the March quarter to $3.8 billion -- or 28% of Apple's overall sales. How the iPad will impact Apple's revenue picture remains to be seen, though early reports suggest that the tablet device could eventually give the iPhone a run for its money.

Read the whole story at Business Insider »