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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.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 ...

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, ...

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 ...

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.captcha.tv/captcha-forms.html

How about a fully working captcha form which actually sends off the information inserted by the user ? Before I show you this example, just a few observations on  ...

www.google.com/recaptcha/api2/demo

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

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

Jan 16, 2011 ... This is one of the easiest CAPTCHA scripts you will ever use. While it doesn't ... A Simple PHP CAPTCHA Script ... Example CAPTCHA image:.

webdesign.tutsplus.com/tutorials/how-to-integrate-no-captcha-recaptcha-in-your-website--cms-23024

Jan 13, 2015 ... CAPTCHA inputs are perhaps the commonest of all frustrating ... For example, adding data-theme="dark" to this div will give you a dark version, ...