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  2. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in US patent 2950048A, granted on 23 August 1960. [ 1]

  3. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    Linux systems adhere to POSIX, [87] SUS, [88] LSB, ISO, and ANSI standards where possible, although to date only one Linux distribution has been POSIX.1 certified, Linux-FT. [89] [90] Free software projects, although developed through collaboration, are often produced independently of each other. The fact that the software licenses explicitly ...

  4. Modulo - Wikipedia

    en.wikipedia.org/wiki/Modulo

    In computing, the modulo operation returns the remainder or signed remainder of a division, after one number is divided by another, called the modulus of the operation.. Given two positive numbers a and n, a modulo n (often abbreviated as a mod n) is the remainder of the Euclidean division of a by n, where a is the dividend and n is the divisor.

  5. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12. In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his book Disquisitiones ...

  6. Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Main_Page

    Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects : Commons. Free media repository. MediaWiki. Wiki software development.

  7. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet is a multi-national American company that provides tools for studying and learning. [ 1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2] and released to the public in January 2007. [ 3] Quizlet's primary products include digital flash cards, matching games, practice electronic ...

  8. History of English - Wikipedia

    en.wikipedia.org/wiki/History_of_English

    e. English is a West Germanic language that originated from Ingvaeonic languages brought to Britain in the mid-5th to 7th centuries AD by Anglo-Saxon migrants from what is now northwest Germany, southern Denmark and the Netherlands. The Anglo-Saxons settled in the British Isles from the mid-5th century and came to dominate the bulk of southern ...

  9. History of England - Wikipedia

    en.wikipedia.org/wiki/History_of_England

    [8] [9] [10] Following the Industrial Revolution, which started in England, Great Britain ruled a colonial Empire, the largest in recorded history. Following a process of decolonisation in the 20th century, mainly caused by the weakening of Great Britain's power in the two World Wars; almost all of the empire's overseas territories became ...