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  2. Group code - Wikipedia

    en.wikipedia.org/wiki/Group_code

    In coding theory, group codes are a type of code. Group codes consist of n {\displaystyle n} linear block codes which are subgroups of G n {\displaystyle G^{n}} , where G {\displaystyle G} is a finite Abelian group .

  3. List of NATO Supply Classification Groups - Wikipedia

    en.wikipedia.org/wiki/List_of_NATO_Supply...

    The NATO Stock Number or National Stock Number (NSN) is a 13-digit alphanumeric code consisting of a Group of Supply, a Class of Supply and the unique NIIN to designate unique items of supply grouped by their relative catalog category. The first four digits are the NATO Supply Classification (NSC) or Federal Supply Class (FSC) code.

  4. List of USAAF squadron codes - Wikipedia

    en.wikipedia.org/wiki/List_of_USAAF_squadron_codes

    A B-24 with squadron code 2C, denoting the 838th Bombardment Squadron of the 487th Bombardment Group (tail Square P) A B-17 with squadron code LL, denoting the 401st Bombardment Squadron of the 91st Bombardment Group (tail Triangle A) A B-17 with squadron code VE, denoting the 532d Bombardment Squadron of the 381st Bombardment Group (tail ...

  5. USAAF unit identification aircraft markings - Wikipedia

    en.wikipedia.org/wiki/USAAF_unit_identification...

    The first Eighth Air Force aircraft to receive unit markings were the Spitfires of the 4th and 31st Fighter Groups training with RAF Fighter Command in September 1942. The markings were two-letter fuselage squadron codes located on one side of the national insignia and a single letter aircraft code on the other side.

  6. Multiservice tactical brevity code - Wikipedia

    en.wikipedia.org/wiki/Multiservice_tactical...

    Using the codes eases coordination and improves understanding during multiservice operations. The codes are intended for use by air, ground, sea, and space operations personnel at the tactical level. Code words that are followed by an asterisk (*) may differ in meaning from NATO usage. There is a key provided below to describe what personnel ...

  7. Air Force Specialty Code - Wikipedia

    en.wikipedia.org/wiki/Air_Force_Specialty_Code

    The Air Force Specialty Code (AFSC) is an alphanumeric code used by the United States Air Force to identify a specific job. Officer AFSCs consist of four characters and enlisted AFSCs consist of five characters. A letter prefix or suffix may be used with an AFSC when more specific identification of position requirements and individual ...

  8. ISO 639-5 - Wikipedia

    en.wikipedia.org/wiki/ISO_639-5

    Languages, families, or group codes in ISO 639-2 can be of type "group" (g) or "remainder group" (r). A "group" consists of several related languages; a "remainder group" is a group of several related languages from which some specific languages have been excluded. However, in ISO 639-5, the "remainder groups" do not exclude any languages ...

  9. U.S. Navy and U.S. Marine Corps aircraft tail codes - Wikipedia

    en.wikipedia.org/wiki/U.S._Navy_and_U.S._Marine...

    The "C" code issued to this NAS was a controlled duplicate of the same code letter given to Carrier Air Group 5. Code changed to "7C" in 1956. CVG-6, Carrier Air Group 6Carrier Air Group 6: 1952 Tail code changed to "AF" in November 1956. TW-3, Training Air Wing 3 Disestablished in August 1992.