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  2. Japanese naval codes - Wikipedia

    en.wikipedia.org/wiki/Japanese_naval_codes

    Japanese naval codes. The vulnerability of Japanese naval codes and ciphers was crucial to the conduct of World War II, and had an important influence on foreign relations between Japan and the west in the years leading up to the war as well. Every Japanese code was eventually broken, and the intelligence gathered made possible such operations ...

  3. Polar code (coding theory) - Wikipedia

    en.wikipedia.org/wiki/Polar_code_(coding_theory)

    Polar code (coding theory) In information theory, a polar code is a linear block error-correcting code. The code construction is based on a multiple recursive concatenation of a short kernel code which transforms the physical channel into virtual outer channels. When the number of recursions becomes large, the virtual channels tend to either ...

  4. Read code - Wikipedia

    en.wikipedia.org/wiki/Read_code

    Read code. Read codes are a clinical terminology system that was in widespread use in General Practice in the United Kingdom until around 2018, when NHS England switched to using SNOMED CT. Read codes are still in use in Scotland and in England were permitted for use in NHS secondary care settings, such as dentistry and mental health care until ...

  5. Gold Codes - Wikipedia

    en.wikipedia.org/wiki/Gold_Codes

    Gold Codes. The Gold Code is the launch code for nuclear weapons provided to the President of the United States in their role as commander-in-chief of the armed forces. [1] In conjunction with the nuclear football, the Gold Codes allow the president to authorize a nuclear attack. [2] Gold Codes, as well as a separate nuclear football, are also ...

  6. List of airline codes - Wikipedia

    en.wikipedia.org/wiki/List_of_airline_codes

    Download as PDF; Printable version; This is a list of all airline ... ICAO code in use by another company, call sign no longer allocated VL VIM Air VIA:

  7. Copyleft - Wikipedia

    en.wikipedia.org/wiki/Copyleft

    Copyleft is a distinguishing feature of some free software licenses, while other free-software licenses are not copyleft licenses because they do not require the licensee to distribute derivative works under the same license. There is an ongoing debate as to which class of license provides the greater degree of freedom.

  8. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    The standard deviation σ of X is defined as which can be shown to equal. Using words, the standard deviation is the square root of the variance of X . The standard deviation of a probability distribution is the same as that of a random variable having that distribution. Not all random variables have a standard deviation.

  9. Diagnosis code - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_code

    In health care, diagnosis codes are used as a tool to group and identify diseases, disorders, symptoms, poisonings, adverse effects of drugs and chemicals, injuries and other reasons for patient encounters. Diagnostic coding is the translation of written descriptions of diseases, illnesses and injuries into codes from a particular classification.