Design and development engineers have a responsibility to communicate and cooperate fully with technical writers if successful publications are to emerge from an organization. It is the writer's obligation to obtain the respect and confidence of the engineers so that information is rendered accurately and for mutual benefit. Such information may take the form of explanatory documents, manuals, brochures, reports, specifications, and publications for employee training. Illustrations are part of an international technical writing language. Their purpose is to convey a message with little or no text and they must be carefully crafted not to hand the reader a puzzle.