Over 60 million CAPTCHAs are solved every day by people around the world. reCAPTCHA channels this human effort into helping to digitize books from the Internet Archive. When you solve a reCAPTCHA, you help preserve literature by deciphering a word that was not readable by computers. Learn more.

reCAPTCHA is a project of the School of Computer Science at Carnegie Mellon University.

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Created by igorgue on 19th Nov 2007