You’ve probably seen one of these things on the Web before:
reCAPTCHA is a free service to protect your site from SPAM. It works for comment forms on blogs, for CMSs, for email addresses and more.
The coolest thing about reCAPTCHA, though, is that you’re helping to digitize books with every CAPTCHA you solve. Read all about it at reCAPTCHA’s site.
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