print email comment close Recaptcha URL: http://recaptcha.net/ Description: "A 'captcha' is a program that can tell whether its user is a human or a computer [such as those with distorted images of letters]." You can use this site to help stop receiving email spam "by asking people to solve a recaptcha before they can view your email address" (if you are running a web application that lists user's email addresses). This process uses unclear images from digitized books. From Carnegie Mellon University. Publisher: Carnegie Mellon University Extra Keywords mailhide LII Database Information: Record 25938 created by Maria Brandt on 04/16/2008 Last modification on 06/10/2008 Published: 06/19/2008   Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/25938