reCAPTCHA… Stop Spam, Read (digital) books

Thanks for the tip, Diwaker!

A lot of sites use images which cannot be “read” by computers as a means to stop spam. Generally a human types in the word displayed in the image and goes through. The reCAPTCHA project aims at giving you such images for use and in turn uses the typed in results by people to digitally covert books!

http://recaptcha.net/learnmore.html