By Philip Elmer-DeWitt
February 8, 2011

The indefatigable Horace Dediu points out on that although Apple’s (AAPL) iOS and Google’s (GOOG) Android are less than two years old as platforms, together they have captured 50.2% of what he calls “the most competitive market technology market on the planet.”

Below: The same data graphed as market share.

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