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  2. Invoice - Wikipedia

    en.wikipedia.org/wiki/Invoice

    An invoice, bill, tab, or bill of costs is a commercial document that includes an itemized list of goods or services furnished by a seller to a buyer relating to a sale transaction, that usually specifies the price and terms of sale., quantities, and agreed-upon prices and terms of sale for products or services the seller had provided the buyer.

  3. Essay - Wikipedia

    en.wikipedia.org/wiki/Essay

    Essays often appear in magazines, especially magazines with an intellectual bent, such as The Atlantic and Harpers. Magazine and newspaper essays use many of the essay types described in the section on forms and styles (e.g., descriptive essays, narrative essays, etc.). Some newspapers also print essays in the op-ed section.

  4. An Essay on the Principle of Population - Wikipedia

    en.wikipedia.org/wiki/An_Essay_on_the_Principle...

    The book An Essay on the Principle of Population was first published anonymously in 1798, [1] but the author was soon identified as Thomas Robert Malthus.The book warned of future difficulties, on an interpretation of the population increasing in geometric progression (so as to double every 25 years) [2] while food production increased in an arithmetic progression, which would leave a ...

  5. Natural language processing - Wikipedia

    en.wikipedia.org/wiki/Natural_language_processing

    Natural language processing (NLP) is a subfield of computer science and especially artificial intelligence.It is primarily concerned with providing computers with the ability to process data encoded in natural language and is thus closely related to information retrieval, knowledge representation and computational linguistics, a subfield of linguistics.