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  2. 80 Acronym Examples You Should Know - AOL

    www.aol.com/50-acronym-examples-texting...

    80 Acronym Examples You Should Know. Kelly Kuehn. July 6, 2021 at 8:30 AM ... Acronym used in mathematics to remember the trigonometric functions sine, cosine, and tangent. ... CAPTCHA. Completely ...

  3. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    An example of a reCAPTCHA challenge from 2007, containing the words "following finding". The waviness and horizontal stroke were added to increase the difficulty of breaking the CAPTCHA with a computer program. A CAPTCHA usually has a text box directly underneath where the user should fill out the text that they see. In this case, "sclt ..was ...

  4. Huh? We Never Would Have Guessed What 'CAPTCHA ... - AOL

    www.aol.com/huh-never-guessed-captcha-actually...

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  5. reCAPTCHA - Wikipedia

    en.wikipedia.org/wiki/ReCAPTCHA

    An example of how reCAPTCHA challenges were presented in 2010, [29] containing the words "and chisels" The main purpose of a CAPTCHA system is to block spambots while allowing human users. On December 14, 2009, Jonathan Wilkins released a paper describing weaknesses in reCAPTCHA that allowed bots to achieve a solve rate of 18%.

  6. Oblivious pseudorandom function - Wikipedia

    en.wikipedia.org/wiki/Oblivious_Pseudorandom...

    A CAPTCHA or "Completely Automated Public Turing test to tell Computers and Humans Apart." [ 14 ] is a mechanism to prevent automated robots or ( bots ) from accessing websites. Lately, mechanisms for running CAPTCHA tests have been centralized to services such as a Google and CloudFlare , but this can come at the expense of user privacy.

  7. Turing test - Wikipedia

    en.wikipedia.org/wiki/Turing_test

    The CAPTCHA system is commonly used online to tell humans and bots apart on the internet. It is based on the Turing test. Displaying distorted letters and numbers, it asks the user to identify the letters and numbers and type them into a field, which bots struggle to do. [18] [61] The reCaptcha is a CAPTCHA system owned by Google. The reCaptcha ...

  8. Luis von Ahn - Wikipedia

    en.wikipedia.org/wiki/Luis_von_Ahn

    In 2007, von Ahn invented reCAPTCHA, [24] a new form of CAPTCHA that also helps digitize books. In reCAPTCHA, the images of words displayed to the user come directly from old books that are being digitized; they are words that optical character recognition could not identify and are sent to people throughout the web to be identified. ReCAPTCHA ...

  9. List of logic symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_logic_symbols

    The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics. Additionally, the subsequent columns contains an informal explanation, a short example, the Unicode location, the name for use in HTML documents, [1] and the LaTeX symbol.