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  2. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    A CAPTCHA ( / ˈkæp.tʃə / 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. [1] The term was coined in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford. [2]

  3. Login session - Wikipedia

    en.wikipedia.org/wiki/Login_session

    Login session. In computing, a login session is the period of activity between a user logging in and logging out of a (multi-user) system . On Unix and Unix-like operating systems, a login session takes one of two main forms: When a textual user interface is used, a login session is represented as a kernel session — a collection of process ...

  4. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

  5. Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  6. Snapchat - Wikipedia

    en.wikipedia.org/wiki/Snapchat

    Website. www.snapchat.com. Snapchat is an American multimedia instant messaging app and service developed by Snap Inc., originally Snapchat Inc. One of the principal features of Snapchat is that pictures and messages are usually only available for a short time before they become inaccessible to their recipients.

  7. At sign - Wikipedia

    en.wikipedia.org/wiki/At_sign

    At sign. The at sign, @, is an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets @ £ 2 per widget = £14), [1] now seen more widely in email addresses and social media platform handles. It is normally read aloud as "at" and is also commonly called the at symbol, commercial at, or address sign .

  8. WhatsApp University - Wikipedia

    en.wikipedia.org/wiki/WhatsApp_University

    The rationale behind using the term "WhatsApp University" is that the universities are a medium to provide knowledge and information. Similarly, since WhatsApp has taken over as the most preferred communication medium in India, it is now being used to share information which is rather funny and unrealistic, and it may have serious sequences.

  9. Logarithm - Wikipedia

    en.wikipedia.org/wiki/Logarithm

    e. In mathematics, the logarithm is the inverse function to exponentiation. That means that the logarithm of a number x to the base b is the exponent to which b must be raised to produce x. For example, since 1000 = 103, the logarithm base of 1000 is 3, or log10 (1000) = 3.

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