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CAPTCHA

Completely Automated Public Turing test to tell Computers and Humans Apart

Computing » Internet
What does CAPTCHA mean?
CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot. For example, humans can read distorted text, but current computer programs can’t.
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World Wide CAPTCHA Completely Automated Public Turing test to tell Computers and Humans Apart