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  2. Valediction - Wikipedia

    en.wikipedia.org/wiki/Valediction

    Valediction. A valediction ( derivation from Latin vale dicere, "to say farewell"), [1] or complimentary close in American English, [2] is an expression used to say farewell, especially a word or phrase used to end a letter or message, [3] [4] or a speech made at a farewell. [3]

  3. Acronym - Wikipedia

    en.wikipedia.org/wiki/Acronym

    This includes letters removed from the end of a word such as prof. for professor, letters removed from the middle of a word such as rd. for road and a contraction such as I'm for I am. An acronym its general sense, a.k.a. initialism, is the first letter of each word of a phrase such as IRS for Internal Revenue Service which is pronounced as ...

  4. Spelling alphabet - Wikipedia

    en.wikipedia.org/wiki/Spelling_alphabet

    Spelling alphabet. A spelling alphabet ( also called by various other names) is a set of words used to represent the letters of an alphabet in oral communication, especially over a two-way radio or telephone. The words chosen to represent the letters sound sufficiently different from each other to clearly differentiate them.

  5. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    Glossary of mathematical symbols. A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various ...

  6. English orthography - Wikipedia

    en.wikipedia.org/wiki/English_orthography

    English orthography is the writing system used to represent spoken English, [1] [2] allowing readers to connect the graphemes to sound and to meaning. [3] It includes English's norms of spelling, hyphenation, capitalisation, word breaks, emphasis, and punctuation . Like the orthography of most world languages, English orthography has a broad ...

  7. Substitution cipher - Wikipedia

    en.wikipedia.org/wiki/Substitution_cipher

    t. e. In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by ...

  8. Grapheme - Wikipedia

    en.wikipedia.org/wiki/Grapheme

    In linguistics, a grapheme is the smallest functional unit of a writing system. [1] The word grapheme is derived from Ancient Greek γράφω (gráphō) 'write' and the suffix -eme by analogy with phoneme and other names of emic units. The study of graphemes is called graphemics. The concept of graphemes is abstract and similar to the notion ...

  9. Business correspondence - Wikipedia

    en.wikipedia.org/wiki/Business_correspondence

    Business correspondence. Business correspondence means the exchange of information in a written format for the process of business activities. Business correspondence can take place between organizations, within organizations or between the customers and the organization. The correspondence refers to the written communication between persons.