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datenkeller: captcha

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1. reCAPTCHA: Stop Spam, Read Books
   Empolying CAPTCHAs to use humans as the better OCR-programs
   11-06-2007 to captcha, devel, nerdalert, thema, web and -1 others
2. PWNtcha - captcha decoder
   anti captcha technology
   21-03-2006 to captcha, security, web and -1 others

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