"Communities of scholars, researchers, or professionals engage in sustained discourse with new insights and discoveries occurring over time as a result of varied perspectives and interpretations." -ACRL's Framework for Information Literacy for Higher Education
"Not to be confused with a book review, a literature review surveys scholarly articles, books and other sources (e.g. dissertations, conference proceedings) relevant to a particular issue, area of research, or theory, providing a description, summary, and critical evaluation of each work. The purpose is to offer an overview of significant literature published on a topic."
Conference Proceedings: Conferences are a major source of cutting edge research, particularly in science and engineering. At conferences, researchers present papers on the research they are doing and obtain feedback from the audience.
Professional or Society Journals/Magazines: Publications produced by a professional association. Reports on current issues, trends, and emerging studies within an industry.
Scholarly Journal Articles: In-depth literature reviews and reports on studies conducted in a field of study. Authors are major researchers or professors in the field.
Standards: Standards provide technical guidelines for promoting safety, reliability, productivity and efficiency across engineering.
Books: Books provide a broad overview, history, and background information on a given topic. They may be available in electronic form.