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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. 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 ...

  4. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    ME – Plain text document normally preceded by the word "READ" (READ.ME) MCW – Microsoft Word for Macintosh (versions 4.0–5.1) Mobi – Mobipocket documents; NB – Mathematica Notebook; nb – Nota Bene Document (Academic Writing Software) NBP – Mathematica Player Notebook

  5. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    The digit the farthest to the right (which is multiplied by 1) is the check digit, chosen to make the sum correct. It may need to have the value 10, which is represented as the letter X. For example, take the ISBN 0-201-53082-1: The sum of products is 0×10 + 2×9 + 0×8 + 1×7 + 5×6 + 3×5 + 0×4 + 8×3 + 2×2 + 1×1 = 99 ≡ 0 (mod 11). So ...

  6. Modulo - Wikipedia

    en.wikipedia.org/wiki/Modulo

    The range of values for an integer modulo operation of n is 0 to n − 1 ( a mod 1 is always 0; a mod 0 is undefined, being a division by zero ). When exactly one of a or n is negative, the basic definition breaks down, and programming languages differ in how these values are defined.

  7. List of United States Marine Corps MOS - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    On 30 June 2016, the Marine Corps announced the renaming of 19 MOSs with gender-neutral job titles, replacing the word or word-part "man" with the word "Marine" in most. [3] Not all instances of the word or word-part "man" were removed, e.g., 0171 Manpower Information Systems (MIS) Analyst, 0311 Rifleman, 0341 Mortarman.

  8. Exam - Wikipedia

    en.wikipedia.org/wiki/Exam

    Exam. Cambodian students taking an exam in order to apply for the Don Bosco Technical School of Sihanoukville in 2008. American students in a computer fundamentals class taking an online test in 2001. An examination ( exam or evaluation) or test is an educational assessment intended to measure a test-taker's knowledge, skill, aptitude, physical ...

  9. ModR/M - Wikipedia

    en.wikipedia.org/wiki/ModR/M

    The SIB byte is an optional post-opcode byte in x86 assembly on the i386 and later, used for complex addressing. SIB bytes are formatted similarly to ModR/M bytes, and take the form of (scale * index) + base + displacement, where the SCALE is 1, 2, 4, or 8. BASE and INDEX each encode a register. [ 5] The displacement is a constant offset, whose ...