We all find CAPTCHA’s in most of the websites now a days. CAPTCHA is a contrived acronym for “Completely Automated Public Turing test to tell Computers and Humans Apart.”. The expansion is self explanatory.  reCAPTCHA is a similar service provided by Carnegie Mellon University.

So what is the difference between both these. All features of both are same except that the reCAPTCHA actually helps in digitalising of books. The images shown in reCAPTCHA are actually words scanned from books. When you enter the correct value you are typing a word and giving your contribution in digitalisation. Start using reCAPTCHA and help in digitalisation of books.

You can obtain more information on this from http://recaptcha.net

Join hands and make this project sucessfull.