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  2. Lexicographic order - Wikipedia

    en.wikipedia.org/wiki/Lexicographic_order

    The lexicographical order is one way of formalizing word order given the order of the underlying symbols. The formal notion starts with a finite set A, often called the alphabet, which is totally ordered. That is, for any two symbols a and b in A that are not the same symbol, either a < b or b < a. The words of A are the finite sequences of ...

  3. English alphabet - Wikipedia

    en.wikipedia.org/wiki/English_alphabet

    For the distinction between [ ], / / and , see IPA § Brackets and transcription delimiters. Modern English is written with a Latin-script alphabet consisting of 26 letters, with each having both uppercase and lowercase forms. The word alphabet is a compound of alpha and beta, the names of the first two letters in the Greek alphabet.

  4. Alphabetical order - Wikipedia

    en.wikipedia.org/wiki/Alphabetical_order

    In Pinyin alphabetical order, where words have the same basic letters in pinyin and differ only in modifying diacritics, the unmodified letter comes before the modified letter. For example, e comes before ê (額 ( è ) before 欸 ( ê̄ )), and u comes before and ü (路 ( lù ) before 驢 ( lǘ ) and 努 ( nǔ ) before 女 ( nǚ )).

  5. Alphabet (formal languages) - Wikipedia

    en.wikipedia.org/wiki/Alphabet_(formal_languages)

    v. t. e. In formal language theory, an alphabet, sometimes called a vocabulary, is a non-empty set of indivisible symbols /characters/ glyphs, [1] typically thought of as representing letters, characters, digits, phonemes, or even words. [2][3] Alphabets in this technical sense of a set are used in a diverse range of fields including logic ...

  6. Letter (alphabet) - Wikipedia

    en.wikipedia.org/wiki/Letter_(alphabet)

    Definition and usage. A letter is a type of grapheme, the smallest functional unit within a writing system. Letters are graphemes that broadly correspond to phonemes, the smallest functional units of sound in speech. Similarly to how phonemes are combined to form spoken words, letters may be combined to form written words.

  7. Letter case - Wikipedia

    en.wikipedia.org/wiki/Letter_case

    Letter case. The lower-case "a" and upper-case "A" are the two case variants of the first letter in the English alphabet. Letter case is the distinction between the letters that are in larger uppercase or capitals (more formally majuscule) and smaller lowercase (more formally minuscule) in the written representation of certain languages. The ...

  8. Capitalization in English - Wikipedia

    en.wikipedia.org/wiki/Capitalization_in_English

    APA Style is a “down” style, meaning that words are lowercase unless there is specific guidance to capitalize them such as words beginning a sentence; proper nouns and trade names; job titles and positions; diseases, disorders, therapies, theories, and related terms; titles of works and headings within works; titles of tests and measures; nouns followed by numerals or letters; names of ...

  9. Crossword abbreviations - Wikipedia

    en.wikipedia.org/wiki/Crossword_abbreviations

    Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...