This article talks about Information Design, which focuses more narrowly on the information itself in one or more information units, and may encompass the information aspects of industrial design, information content design, page design, Web site design, illustration design, typography decisions, and so forth. Information design can be applied to a single work, such as a city map, or to a corporation’s entire set of customer information. Information Design ideas can often be tested in a usability laboratory by observing surrogate users trying to use the designed information and getting their feedback.