Technical graphics originated with the simple need for instructional drawings, but has expanded to include a large variety of applications, materials, processes, and techniques. Engineers and scientists who must frequently communicate complex technical concepts should have a sufficient knowledge of the various types of artwork and methods of preparation that they can plan, direct, and participate in preparing their technical graphics. The types of technical publications produced by most technical organizations are described; guidance toward planning their illustrative content is offered; and a number of sources for visual information are suggested.