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  2. Genealogical numbering systems - Wikipedia

    en.wikipedia.org/wiki/Genealogical_numbering_systems

    Ahnentafel, also known as the Eytzinger Method, Sosa Method, and Sosa-Stradonitz Method, allows for the numbering of ancestors beginning with a descendant. This system allows one to derive an ancestor's number without compiling the complete list, and allows one to derive an ancestor's relationship based on their number.

  3. Alcohol dehydrogenase - Wikipedia

    en.wikipedia.org/wiki/Alcohol_dehydrogenase

    Among the five classes (I-V) of alcohol dehydrogenase, the hepatic forms that are used primarily in humans are class 1. Class 1 consists of α, β, and γ subunits that are encoded by the genes ADH1A, ADH1B, and ADH1C. [29] [30] The enzyme is present at high levels in the liver and the lining of the stomach. [31]

  4. English modal auxiliary verbs - Wikipedia

    en.wikipedia.org/wiki/English_modal_auxiliary_verbs

    The English modal auxiliary verbs are a subset of the English auxiliary verbs used mostly to express modality, properties such as possibility and obligation. [a] They can most easily be distinguished from other verbs by their defectiveness (they do not have participles or plain forms [b]) and by their lack of the ending ‑(e)s for the third-person singular.

  5. History of science and technology in Japan - Wikipedia

    en.wikipedia.org/wiki/History_of_science_and...

    The first truly pocket-sized electronic calculator was the Busicom LE-120A "HANDY", the first single-chip calculator to be built, released in February 1971. [112] The Busicom 141-PF desktop calculator, released in March 1971, was the first computing machine to use a microprocessor , the 4-bit Intel 4004 (co-designed by Busicom's Masatoshi Shima ).