reCAPTCHA
How to pronounce:
ˌriːˈsiː-eɪ-piː-tiː-siː-eɪʧ-eɪ
Definition:
reCAPTCHA is a user-dialogue system originally like the CAPTCHA interface, recaptcha asks users to enter words seen in distorted text images onscreen.
By presenting two words it both protects websites from bots attempting to access restricted areas and helps digitize the text of books.