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  2. 2–3–4 tree - Wikipedia

    en.wikipedia.org/wiki/2–3–4_tree

    In computer science, a 2–3–4 tree (also called a 2–4 tree) is a self-balancing data structure that can be used to implement dictionaries. The numbers mean a tree where every node with children ( internal node ) has either two, three, or four child nodes:

  3. Genesis creation narrative - Wikipedia

    en.wikipedia.org/wiki/Genesis_creation_narrative

    The Genesis creation narrative is the creation myth [a] of both Judaism and Christianity, [1] told in the Book of Genesis ch. 1–2. While the Jewish and Christian tradition is that the account is one comprehensive story, [2] [3] modern scholars of biblical criticism identify the account as a composite work [4] made up of two stories drawn from different sources.

  4. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    2.3.4.1 Activated carbon. 2.4 ... Download as PDF ... solution and releases additional ions of the same charge in a chemically comparable amount without changing the ...

  5. Organizational structure of the United States Department of ...

    en.wikipedia.org/wiki/Organizational_structure...

    The President of the United States is, according to the Constitution, the Commander-in-Chief of the U.S. Armed Forces and Chief Executive of the Federal Government. The Secretary of Defense is the "Principal Assistant to the President in all matters relating to the Department of Defense", and is vested with statutory authority (10 U.S.C. § 113) to lead the Department and all of its component ...

  6. The Art of Computer Programming - Wikipedia

    en.wikipedia.org/wiki/The_Art_of_Computer...

    The offer of a so-called Knuth reward check worth "one hexadecimal dollar" (100 HEX base 16 cents, in decimal, is $2.56) for any errors found, and the correction of these errors in subsequent printings, has contributed to the highly polished and still-authoritative nature of the work, long after its first publication.

  7. Lens - Wikipedia

    en.wikipedia.org/wiki/Lens

    A burning apparatus consisting of two biconvex lens. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.