Do you know what a CAPTCHA is?

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You’ve probably seen a CAPTCHA before—those squiggly words that you have to type in to prove you’re not a robot. CAPTCHAs are used all over the internet to protect websites from spam and abuse.

But what exactly is a CAPTCHA?

CAPTCHA is an acronym that stands for “Completely Automated Public Turing test to tell Computers and Humans Apart.” In other words, it’s a way to determine whether someone is a human or a computer.

Humans are generally good at reading and understanding text, even when it’s distorted. Computers, on the other hand, have a hard time with this task. So by asking users to type in the squiggly words, websites can be sure that it’s a human trying to access the site and not a computer.

CAPTCHAs usually take the form of a distorted image of text or a math problem. The text might be displayed in an unusual font or be wavy, making it hard for a computer to read. Or, the CAPTCHA might ask you to solve a simple math problem, like “what is 2+2?”

Because CAPTCHAs are designed to be difficult for computers to solve, they can sometimes be difficult for humans as well. If you’ve ever struggled to read a CAPTCHA, you’re not alone—about 10% of people have the same problem.

If you’re having trouble with a CAPTCHA, there are a few things you can try. First, make sure that you’re using a modern web browser. Older browsers might not be able to display CAPTCHAs correctly.

If you’re still having trouble, try reloading the page. Sometimes the CAPTCHA image will be clearer the second time around.

And if all else fails, you can always try one of the many CAPTCHA-solving services that are available online. These services usually work by having humans solve CAPTCHAs and then providing the correct answer to the computer.

So next time you come across a CAPTCHA, take a moment to appreciate the clever technology that’s keeping the internet safe from spam and abuse.

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