How do you tell computers and humans apart? In cases where we can’t see whether we are interacting with a real human or a computer, CAPTCHA is sometimes used to prevent comment spam.
CAPTCHArt : A blog for turning random CAPTHCA phrases/ letters into art.
Know your Meme: CAPTCHArt
Rhizome: General Web Content – CAPTCHArt
Urlesque: Captchart Turns Random Captcha Phrases into Art
Geek O System: Captchart – The Art of Proving You’re Human
Cerebral Pop: Found – CAPTCHArt
Comics Alliance: Captcha Codes Find True Meaning in CAPTCHArt Comics