 Primarily excluded from the definition of professional communication would be diary entries (discourse directed toward the writer), personal correspondence (discourse directed to one or more readers apart from their group affiliations), reportage or belletristic discourse (novels, poems, occasional essays--discourse usually written by individuals and directed to multiple readers not organized as a group), most intraclassroom communications (for example, classroom discourse composed by students for teachers) and some technical communications (for example, instructions--for changing a tire, assembling a product, and the like; again, discourse directed toward readers or listeners apart from their group affiliations)...Professional communication...would seem different from discourse involving a single individual apart from a group affiliation communicating with another such person, or a single individual communicating with a large unorganized aggregate of individuals as suggested by the term mass communication (Blyler and Thralls, "Professional Communication