VIDEO | by butterscotch

What is a CAPTCHA?

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VIDEO DESCRIPTION:
We've all run into CAPTCHAs: those sometimes annoying, sometimes hard to decipher strings of characters and numbers that ...
appear online. They have to be punched in exactly as they appear when signing up for a free email account, posting a comment in a public forum and so on. But what are they and what purpose do they serve? Stacy Reed explains.
Posted: 11/29/2009 | Views: 3,195 | Duration: 03:40
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