Human or Computer? Take This Test

December 10, 2002 | Source: New York Times

Yahoo and Carnegie Mellon have developed the “Completely Automated Public Turing Test to Tell Computers and Humans Apart” (Captchas) to block bots that post spam and collect personal data.

To stymie bots, it presents distorted words displayed against a complicated background or distorted sound clips, requiring humans to enter the correct information for admittance to chat rooms.