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  2. Natural logarithm - Wikipedia

    en.wikipedia.org/wiki/Natural_logarithm

    The natural logarithm of x is generally written as ln x, log e x, or sometimes, if the base e is implicit, simply log x. [2] [3] Parentheses are sometimes added for clarity, giving ln(x), log e (x), or log(x). This is done particularly when the argument to the logarithm is not a single symbol, so as to prevent ambiguity.

  3. Mastercard - Wikipedia

    en.wikipedia.org/wiki/Mastercard

    The operations hub is located in St. Louis, Missouri. Banknet uses the ISO 8583 protocol. Mastercard's network differs significantly from Visa's. Visa's is a star-based system where all endpoints terminate at one of several main data centers, where all transactions are processed centrally.

  4. Snapchat - Wikipedia

    en.wikipedia.org/wiki/Snapchat

    "Login Kit" is a social login platform that utilizes Snapchat accounts. It was promoted as being more privacy-conscious than competing equivalents, as services are only able to receive the user's display name (and, optionally, a Bitmoji avatar) and are subject to a 90-day inactivity timeout, preventing them from being able to collect any ...

  5. Petrel (reservoir software) - Wikipedia

    en.wikipedia.org/wiki/Petrel_(reservoir_software)

    Petrel is a software platform by Schlumberger Information Solutions used in the exploration and production sector of the petroleum industry. It is a cloud-based platform designed to develop collaborative workflows to increase oil and gas performance.

  6. Multiplication sign - Wikipedia

    en.wikipedia.org/wiki/Multiplication_sign

    The multiplication sign (×), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. [ 1 ] The symbol is also used in botany , in botanical hybrid names and the heavy goods vehicle industry, to calculate the amount of powered wheels.

  7. At sign - Wikipedia

    en.wikipedia.org/wiki/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. Marguerite de Witt-Schlumberger - Wikipedia

    en.wikipedia.org/.../Marguerite_de_Witt-Schlumberger

    Marguerite de Witt-Schlumberger (20 January 1853 – 23 October 1924) was a French campaigner for pronatalism, alcoholic abstinence, and feminism. She was the president of the French Union for Women's Suffrage ( Union française pour le suffrage des femmes / UFSF) movement. [ 1 ]

  9. Sign in to AOL Desktop Gold and manage your usernames

    help.aol.com/articles/aol-desktop-signing-on

    1. Launch AOL Desktop Gold. 2. On the sign on screen, click the small arrow pointing down. 3. Click Add Username. 4. Type in another username and click Continue.Enter your password in the window that appears.