reCAPTCHA: distributed book digitization while fighting spam
Thanks to spammers, we now are forced waste a substantial portion of time every day, typing in obfuscated wiggly letters to prove we are human. reCATPCHA is a slick idea for using the CAPTCHA system for doing something productive (…besides distinguising between homo sapien and homo computatralis). With reCAPTCHA, the user is given two words, […]