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Crunching the Numbers on Mobile Payment Systems

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This story appears in the December 2011 issue of Entrepreneur. Subscribe »

Corrections & Amplifications

The cashless society is coming: American consumers now carry more than 750 million credit cards, while paper currency production continues to decline. In fact, the U.S. Bureau of Printing and Engraving produced fewer $1 and $5 bills in 2010 than at any other time in the last 30 years.

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