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  2. Vessel emergency codes - Wikipedia

    en.wikipedia.org/wiki/Vessel_emergency_codes

    Charlie, Charlie, Charlie is the code for a security threat aboard Royal Caribbean ships and the code for upcoming helicopter winch operations aboard c-bed accommodation vessels. Code blue usually means a medical emergency. Delta, delta, delta is the code for a possible bio-hazard among some cruise lines. More commonly used to alert crew to ...

  3. Cargo 200 (code name) - Wikipedia

    en.wikipedia.org/wiki/Cargo_200_(code_name)

    The first appearance of Cargo 200 is unknown, except that it came into use in the mid-1980s during the Soviet–Afghan War.The main theory of the term's origin is the Ministry of Defense of the USSR Order No. 200, issued during the on October 8, 1984, coincidentally setting the standardized maximum weight for the air transportation of a deceased soldier's body at 200 kilograms (440 lb).

  4. Poem code - Wikipedia

    en.wikipedia.org/wiki/Poem_code

    Between Silk and Cyanide by Leo Marks, HarperCollins (1998), ISBN 0-00-255944-7.Marks was the Head of Codes at SOE and this book is an account of his struggle to introduce better encryption for use by field agents. it contains more than 20 previously unpublished code poems by Marks, as well as descriptions of how they were used and by whom.

  5. ISO 3166-1 alpha-2 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1_alpha-2

    The United Nations uses a combination of ISO 3166-1 alpha-2 and alpha-3 codes, along with codes that pre-date the creation of ISO 3166, for international vehicle registration codes, which are codes used to identify the issuing country of a vehicle registration plate; some of these codes are currently indeterminately reserved in ISO 3166-1.

  6. Thought disorder - Wikipedia

    en.wikipedia.org/wiki/Thought_disorder

    A thought disorder (TD) is a disturbance in cognition which affects language, thought and communication. [1] [2] Psychiatric and psychological glossaries in 2015 and 2017 identified thought disorders as encompassing poverty of ideas, neologisms, paralogia (a reasoning disorder characterized by expression of illogical or delusional thoughts), word salad, and delusions—all disturbances of ...

  7. Telegraph code - Wikipedia

    en.wikipedia.org/wiki/Telegraph_code

    The code book was revised and simplified in 1795 to speed up transmission. The code was in two divisions, the first division was 94 alphabetic and numeric characters plus some commonly used letter combinations. The second division was a code book of 94 pages with 94 entries on each page. A code point was assigned for each number up to 94.

  8. Comma-free code - Wikipedia

    en.wikipedia.org/wiki/Comma-free_code

    A comma-free code is block code in which no concatenation of two code words contains a valid code word that overlaps both. [1] Comma-free codes are also known as self-synchronizing block codes [2] because no synchronization is required to find the beginning of a code word.

  9. Two-letter country codes - Wikipedia

    en.wikipedia.org/wiki/Two-letter_country_codes

    Two-letter country codes are used to represent countries and states (often both widely recognized and not) as a code of two letters. ISO 3166-1 alpha-2 is the main set of two-letter country codes that is currently used. This standard set of codes is a part of ISO 3166-1, also maintains a list of three-letter codes for countries (ISO 3166-1 ...