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  2. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name.

  3. APL syntax and symbols - Wikipedia

    en.wikipedia.org/wiki/APL_syntax_and_symbols

    APL uses the term operator in Heaviside’s sense as a moderator of a function as opposed to some other programming language's use of the same term as something that operates on data, ref. relational operator and operators generally.

  4. Airbus A220 - Wikipedia

    en.wikipedia.org/wiki/Airbus_A220

    The program was launched on 13 July 2008. The smaller A220-100 (formerly CS100) first flew on 16 September 2013, received an initial type certificate from Transport Canada on 18 December 2015, and entered service on 15 July 2016 with launch operator Swiss Global Air Lines .

  5. Deuterium - Wikipedia

    en.wikipedia.org/wiki/Deuterium

    The reduced mass of the system in these equations is close to the mass of a single electron, but differs from it by a small amount about equal to the ratio of mass of the electron to the nucleus. For 1 H, this amount is about ⁠ 1837 / 1836 ⁠ , or 1.000545, and for 2 H it is even smaller: ⁠ 3671 / 3670 ⁠ , or 1.0002725.

  6. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    The base "Roman fraction" is S, indicating 1 ⁄ 2. The use of S (as in VIIS to indicate 7 1 ⁄ 2) is attested in some ancient inscriptions [45] and also in the now rare apothecaries' system (usually in the form SS): [44] but while Roman numerals for whole numbers are essentially decimal, S does not correspond to 5 ⁄ 10, as one might expect ...

  7. Economic history of the United States - Wikipedia

    en.wikipedia.org/wiki/Economic_history_of_the...

    Seeking greater efficiency, Morris reduced the civil list, saved money by using competitive bidding for contracts, tightened accounting procedures, and demanded the federal government's full share of money and supplies from the states. [29]: 225–52 A one-dollar note issued by the Second Continental Congress in 1775

  8. Airbus A380 - Wikipedia

    en.wikipedia.org/wiki/Airbus_A380

    Airbus's publicity has stressed the comfort and space of the A380 cabin, [220] and advertised onboard relaxation areas such as bars, beauty salons, duty-free shops, and restaurants. [ 221 ] [ 222 ] Proposed amenities resembled those installed on earlier airliners, particularly 1970s wide-body jets, [ 223 ] which largely gave way to regular ...

  9. Archer Daniels Midland - Wikipedia

    en.wikipedia.org/wiki/Archer_Daniels_Midland

    In 2001, it agreed to pay a $1.46 million fine for violating federal and Illinois clean-air regulations at its Decatur feed plant and to spend $1.6 million to reduce air pollution there. [60] In 2003, the company settled federal air pollution complaints related to its efforts to avoid New Source Review provisions of the Clean Air Act that ...