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By early next year, hailing a yellow cab in New York City could be as easy as whipping out a smartphone and pressing a button.

Cara Hafferty was skimming Twitter about a year ago when a tweet from SmallCanBeBig.org, a Boston charity, caught her eye.

Brazil has long been recognized as the first initial of the BRIC (Brazil, Russia, India and China), the four emerging economies on track to become the next major world players.

More grist for the rumor mill ahead of the so-called iPad mini’s expected debut later this month.