Swipe Your Credit Card on a Cell Phone

Monday, December 7, 2009 - 17:14 in Mathematics & Economics

(PhysOrg.com) -- With a small card reader that attaches to a cell phone, a new company is making it easier for small businesses and even individuals to accept credit card payments. The San Francisco start-up, called Square, which opened just last week, is headed by Twitter cofounder Jack Dorsey.

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