What is a CAPTCHA anti-spam system?
Dave’s Answer: Ah, spam, the bane of our collective online existence. It’s a pain and it’s frustrating how much time and effort we have to collectively expend trying to minimize its impact on our online experiences. Blech. Here’s a fun fact that most people don’t know: CAPTCHA is actually an acronym. It stands for “Completely Automated Public Turing test to tell Computers and Humans Apart.” (Turing here refers to the brilliant computer scientist Alan Turing, who spent much time thinking about how to differentiate really smart computers from humans, to so-called “Turing test”). I know you’ve seen these.
