reCAPTCHA
I use a plug in called reCAPTCHA on several of my WordPress sites. It’s a little program that shows you a picture of a combination of letters for you to type in that prove you are human and not a spammer. I figured CAPTCHA stood for something about character recognition, but I was curious why it was called ‘re’CAPTCHA. Well, I just ran across an article in the Christian Science Monitor about reCAPTCHA. It’s actually quite ingenious. http://features.csmonitor.com/innovation/2009/02/19/recaptcha-how-to-turn-blather-into-books/