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  2. ISBN - Wikipedia

    en.wikipedia.org/wiki/ISBN

    The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. [a] [b] Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency.

  3. Imaginary unit - Wikipedia

    en.wikipedia.org/wiki/Imaginary_unit

    As a complex number, i can be represented in rectangular form as 0 + 1i, with a zero real component and a unit imaginary component. In polar form, i can be represented as 1 × e πi /2 (or just e πi /2), with an absolute value (or magnitude) of 1 and an argument (or angle) of radians.

  4. Log probability - Wikipedia

    en.wikipedia.org/wiki/Log_probability

    (The conversion to log form is expensive, but is only incurred once.) Multiplication arises from calculating the probability that multiple independent events occur: the probability that all independent events of interest occur is the product of all these events' probabilities.

  5. Gamma function - Wikipedia

    en.wikipedia.org/wiki/Gamma_function

    All instances of log(x) ... In a certain sense, the log-gamma function is the more natural form; it makes some intrinsic attributes of the function clearer.

  6. Sulfur - Wikipedia

    en.wikipedia.org/wiki/Sulfur

    Under normal conditions, sulfur atoms form cyclic octatomic molecules with the chemical formula S 8. Elemental sulfur is a bright yellow, crystalline solid at room temperature . Sulfur is the tenth most abundant element by mass in the universe and the fifth most common on Earth.

  7. Google Forms - Wikipedia

    en.wikipedia.org/wiki/Google_Forms

    The Google Forms service has undergone several updates over the years. Features include, but are not limited to, menu search, shuffle of questions for randomized order, limiting responses to once per person, shorter URLs, custom themes, [2] automatically generating answer suggestions when creating forms, [3] and an "Upload file" option for users answering questions that require them to share ...

  8. Phishing - Wikipedia

    en.wikipedia.org/wiki/Phishing

    Phishing is a form of social engineering and a scam where attackers deceive people into revealing sensitive information [1] or installing malware such as viruses, worms, adware, or ransomware.

  9. Reddit - Wikipedia

    en.wikipedia.org/wiki/Reddit

    Reddit (/ ˈ r ɛ d ɪ t /) is an American social news aggregation, content rating, and forum social network. Registered users (commonly referred to as "Redditors") submit content to the site such as links, text posts, images, and videos, which are then voted up or down ("upvoted" or "downvoted") by other members.