By Philip Elmer-DeWitt
September 13, 2010

Within two years, it should be Apple’s second largest source of revenue, after the iPhone

The log chart above, produced by Daniel (“Deagol”) Tello, shows the revenue stream from the iPad overtaking the Mac’s — much as the iPhone did three years earlier and the iPod did a few years before that.

In Tello’s model — available here — the iPhone remains Apple’s (AAPL) No. 1 source of revenue for the foreseeable future.

[Follow Philip Elmer-DeWitt on Twitter @philiped]

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