⇒ technical writing

Technical writers gather information from existing documentation, and from subject matter experts. A subject matter expert (SME) is any expert on the topic the writer is working on. Technical writers usually are not SMEs themselves—unless they're writing about creating good technical documentation.

Workers at many levels, and in many different fields, have a role in producing and distributing technical communications. A good technical writer needs strong language skills, and must understand the highly evolved conventions of modern technical communications. For technical documents to be useful, readers must understand and act on them without having to decode wordy and ambiguous prose.

from http://en.wikipedia.org/wiki/Technical_writing
see http://en.wikipedia.org/wiki/Technical_writer

also http://en.wikipedia.org/wiki/The_Chicago_Manual_of_Style
and http://library.williams.edu/citing/styles/chicago1.php

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