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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. Smith & Wesson Model 10 - Wikipedia

    en.wikipedia.org/wiki/Smith_&_Wesson_Model_10

    The Smith & Wesson Model 10, previously known as the Smith & Wesson .38 Hand Ejector Model of 1899, the Smith & Wesson Military & Police or the Smith & Wesson Victory Model, is a K-frame [2] revolver of worldwide popularity. In production since 1899, the Model 10 is a six-shot, .38 Special, double-action revolver with fixed sights.

  4. 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 ...

  5. United States Secret Service Uniformed Division - Wikipedia

    en.wikipedia.org/wiki/United_States_Secret...

    A USSS Uniformed Division police officer and a USSS Ford Crown Victoria Police Interceptor near the White House in 2012 A 2013 Ford Police Interceptor of the U.S. Secret Service Uniformed Division is pictured outside the White House in Washington, D.C., in July 2013 Secret Service Ford Taurus Secret Service Ford Police Interceptor Utility A U.S. Secret Service "counter-sniper" marksman on top ...

  6. Modulo - Wikipedia

    en.wikipedia.org/wiki/Modulo

    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 ...

  7. Luhn mod N algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_mod_N_algorithm

    Luhn mod N algorithm. The Luhn mod N algorithm is an extension to the Luhn algorithm (also known as mod 10 algorithm) that allows it to work with sequences of values in any even-numbered base. This can be useful when a check digit is required to validate an identification string composed of letters, a combination of letters and digits or any ...

  8. Modulo (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Modulo_(mathematics)

    Modulo is a mathematical jargon that was introduced into mathematics in the book Disquisitiones Arithmeticae by Carl Friedrich Gauss in 1801. [3] Given the integers a, b and n, the expression "a ≡ b (mod n)", pronounced "a is congruent to b modulo n", means that a − b is an integer multiple of n, or equivalently, a and b both share the same remainder when divided by n.

  9. Remington Model 10 - Wikipedia

    en.wikipedia.org/wiki/Remington_Model_10

    The Remington Model 10 is a pump-action shotgun designed in 1908 by John Pedersen for Remington Arms. [2] It has an internal striker within the bolt and a tube magazine which loaded and ejected from a port in the bottom of the receiver. [5] An updated version, the Model 29, was introduced in 1930 with improvements made by C.C. Loomis.