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Stop Spam. Read Books.

Over 200 million CAPTCHAs are solved every day by people around the world. reCAPTCHA channels this human effort into helping to digitize books and newspapers. When you solve a reCAPTCHA, you help preserve literature by deciphering a word that was not readable by computers. Learn more.

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