CAPTCHA

The term CAPTCHA translates to "Completely Automated Turing Test To Tell Computers and Humans Apart." The first CAPTCHA was developed to be used by Yahoo and the term was "coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas Hopper and John Langford of Carnegie Mellon University." You can visit the CAPTCHA site and download the software to add it to your website. The purpose of the CAPTCHA is a

"program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't."

I have to use a CAPTCHA each time I update this blog. It's often a case of the CAPTCHA vs. LIBRARIAN, however. They can be very difficult to use. For instance, is that second letter an i or a j? Could there be an l in front of the b?