Captcha - Wikipedia, the free encyclopedia

What is CAPTCHA? it actually stands for Completely Automated Public Turing test to tell Computers and Humans Apart. haha... interesting isn't it? if you want to know how captcha works on the internet, click on my comments page and you can see an example in action. yeah blogger has captcha. you can activate yours (if you're on blogger) under your settings for Comments in your blog.