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The Best of TED: Massive-scale online collaboration

By Brian | January 8, 2012 | Share on Facebook

Here’s another installment of my Best of TED series, in which I share talks from the Technology, Entertainment and Design conference that have struck me over the years as particularly insightful or fascinating.

Today’s installment is from Luis von Ahn, a member of the team that invented the Captcha system, which helped websites like Ticketmaster and Amazon ensure that the person buying the product was, indeed, a person. Today, these sites use something called ReCaptcha, which shows the user two words instead of one. If you don’t know why, then you’ll find his talk fascinating. You’ll also learn how the same technology can help you learn a foreign language, while at the same time, making digital content available to people all around the world . . . . for free.

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