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	» It is giving an account or description
	of an aspect of a particular art, science, trade
	(industry) or profession (career) learned by
	experience, study, observation, or investigation

	» A special knowledge that belongs to art,
	science, medicine, engineering, architecture,
	business, or the like.

	» to provide sometimes information.

	» the type of writing that will assist
	a person with understanding more about a
	particular item, such as a computer or a
	new drug or a new piece of technology.

	» used to explain how an object works
	or how to complete a project.
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