Luis von Ahn: Massive-scale online collaboration | TED Talk | TED.com

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TEDxCMU · 16:39 · Filmed Apr 2011

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Clay Shirky: How cognitive surplus will change the world

After re-purposing CAPTCHA so each human-typed response helps digitize books, Luis von Ahn wondered how else to use small contributions by many on the Internet for greater good. In this talk, he shares how his ambitious new project, Duolingo, will help millions learn a new language while translating the Web quickly and accurately — all for free.

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Computer scientist

Luis von Ahn builds systems that combine humans and computers to solve large-scale problems that neither can solve alone. Full bio

This talk was presented to a local audience at TEDxCMU, an independent event. TED editors featured it among our selections on the home page.

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