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en.wikipedia.org/wiki/CAPTCHA

A CAPTCHA is a type of challenge-response test used in computing to determine whether or .... For example, in one segment of a CAPTCHA, a letter might look like an “m.” Only when the whole word is taken into context does it become clear  ...

www.findexamples.com/5-examples-of-different-types-of-captchas

Sep 26, 2012 ... captcha word solver, recaptcha captcha, example of captcha ... math solving captcha, math solution captcha, solve a math problem captcha, ...

www.captcha.net

For example, humans can read distorted text as the one shown below, but current ... The term CAPTCHA (for Completely Automated Public Turing Test To Tell ...

captcha.com/captcha-examples.html

Each Captcha image style supported by BotDetect is shown as a single Captcha example screenshot. BotDetect also provides an audio captcha alternative to ...

www.standards-schmandards.com/exhibits/captcha

This is a sample inaccessible registration form. The captcha test image is found below but there is also a link to an alternative test.

www.captcha.tv/captcha-forms.html

How to implement Captcha forms, examples of forms with captcha, forms with captcha, captcha protected web pages,

ui-patterns.com/pattern/Captcha

The whole idea behind Captchas is to create a way to distinguish real human beings ... More examples of the Captcha pattern See all 13 example screenshots.

www.abeautifulsite.net/a-simple-php-captcha-script

Jan 16, 2011 ... This is one of the easiest CAPTCHA scripts you will ever use. ... Example CAPTCHA image: It can be. ... A Simple PHP CAPTCHA Script.

www.google.com/recaptcha/api2/demo

Sample Form with ReCAPTCHA. First Name; Last Name; Email. Pick your favorite color: Red Green.