reCAPTCHA is a free CAPTCHA service that helps to digitize books, newspapers and old time radio shows. 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. Installation is via a few lines of code onto your website.
Type in your interpretation of a distorted word and help digitize books one word at a time