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  2. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.

  3. ISO 4217 - Wikipedia

    en.wikipedia.org/wiki/ISO_4217

    An airline ticket showing the price with ISO 4217 code "EUR" (bottom left) and not with euro currency sign " € "ISO 4217 is a standard published by the International Organization for Standardization (ISO) that defines alpha codes and numeric codes for the representation of currencies and provides information about the relationships between individual currencies and their minor units.

  4. IATA airport code - Wikipedia

    en.wikipedia.org/wiki/IATA_airport_code

    An IATA airport code, also known as an IATA location identifier, IATA station code, or simply a location identifier, is a three-letter geocode designating many airports and metropolitan areas around the world, defined by the International Air Transport Association (IATA). [1] The characters prominently displayed on baggage tags attached at ...

  5. Linear code - Wikipedia

    en.wikipedia.org/wiki/Linear_code

    A linear code of length n and dimension k is a linear subspace C with dimension k of the vector space where is the finite field with q elements. Such a code is called a q -ary code. If q = 2 or q = 3, the code is described as a binary code, or a ternary code respectively. The vectors in C are called codewords.

  6. Dual code - Wikipedia

    en.wikipedia.org/wiki/Dual_code

    Type II codes are binary self-dual codes which are doubly even. Type III codes are ternary self-dual codes. Every codeword in a Type III code has Hamming weight divisible by 3. Type IV codes are self-dual codes over F 4. These are again even. Codes of types I, II, III, or IV exist only if the length n is a multiple of 2, 8, 4, or 2 respectively.

  7. Genetic code - Wikipedia

    en.wikipedia.org/wiki/Genetic_code

    The genetic code is highly similar among all organisms and can be expressed in a simple table with 64 entries. The codons specify which amino acid will be added next during protein biosynthesis. With some exceptions, [1] a three-nucleotide codon in a nucleic acid sequence specifies a single amino acid.

  8. Double bridle - Wikipedia

    en.wikipedia.org/wiki/Double_bridle

    Double bridle, with both curb and snaffle bits.. A double bridle, also called a full bridle or Weymouth bridle, is a bridle that has two bits and four reins (sometimes called "double reins").

  9. List of airports by IATA airport code: A - Wikipedia

    en.wikipedia.org/wiki/List_of_airports_by_IATA...

    UNECE. 28 February 2012. - includes IATA codes "ICAO Location Indicators by State" (PDF). International Civil Aviation Organization. 17 September 2010. Archived from the original (PDF) on 25 March 2019; Aviation Safety Network - IATA and ICAO airport codes; Great Circle Mapper - IATA, ICAO and FAA airport codes