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  2. Luis von Ahn - Wikipedia

    en.wikipedia.org/wiki/Luis_von_Ahn

    They founded a company of the same name, with von Ahn as chief executive officer and Hacker as chief technology officer. In November 2011, a private beta test of Duolingo was launched and the app was released to the public in June 2012. [26] [27] As of May 2020, Duolingo was valued at $1.5 billion. [28]

  3. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  4. reCAPTCHA - Wikipedia

    en.wikipedia.org/wiki/ReCAPTCHA

    reCAPTCHA Inc. [1] is a CAPTCHA system owned by Google.It enables web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images.

  5. Jawed Karim - Wikipedia

    en.wikipedia.org/wiki/Jawed_Karim

    Jawed Karim was born on October 28, 1979, in Merseburg, East Germany, to a Bangladeshi father and a German mother. [3] His father Naimul Karim (Bengali: নাইমুল করিম) is a Bangladeshi who is a researcher at 3M, and his mother, Christine, is a German biochemistry scientist at the University of Minnesota. [4]

  6. YouTube - Wikipedia

    en.wikipedia.org/wiki/YouTube

    YouTube is an American social media and online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim, three former employees of PayPal. Headquartered in San Bruno, California, it is the second-most-visited website in the world, after Google Search.

  7. History of YouTube - Wikipedia

    en.wikipedia.org/wiki/History_of_YouTube

    YouTube's initial headquarters was above a pizzeria and Japanese restaurant in San Mateo, California. [11] The domain name "YouTube.com" was activated on February 14, 2005, with video upload options being integrated on April 23, 2005, with the slogan "Tune In, Hook Up" ─ the original idea of Chad Hurley, Steve Chen, and Jawed Karim.

  8. Max Levchin - Wikipedia

    en.wikipedia.org/wiki/Max_Levchin

    In 1998, he co-founded the company that eventually became PayPal. Levchin made contributions to PayPal's anti-fraud efforts [1] and was the co-creator of the Gausebeck-Levchin test, one of the first commercial implementations of a CAPTCHA challenge response human test. He founded or co-founded the companies Slide.com, HVF, and Affirm.

  9. Steve Chen - Wikipedia

    en.wikipedia.org/wiki/Steve_Chen

    In 2005, Chad Hurley, Jawed Karim and Steve Chen founded YouTube, with Chen having the position of chief technology officer. In June 2006, Chen was named by Business 2.0 as one of "The 50 people who matter now" in business. [8] On October 16, 2006, Chen and Hurley sold YouTube to Google, Inc. for $1.65 billion. Chen received 625,366 shares of ...