To understand design, many projects must be explored; no one project will explain it. For instance, when people need to be shown how to get around a building complex, this is called wayfinding, a discipline of environmental graphic design. Graphic Designer Roger Whitehouse of Whitehouse & Company in New York created a unique visual, tactile and audible wayfinding system for the Lighthouse Inc. Headquarters in New York. When consumers are introduced to a line of products, this is called concept merchandising. Zimmermann Crowe created a program of apparel with video support called Sweats for Levi Strauss & Co. in San Francisco, an inspired example of concept merchandising incorporating product and promotion design. Sit with Design in Depth awhile, pore over its 51 unique design projects. The book was intended to be amusing, compelling and educational. The pictures tell the story, and the brief copy aids in further clarifying each project. Each of the 51 projects and the firms who created them were carefully selected by the directors to reflect part of the range of projects, geographic location and companies designers become engaged with. The idea was to show the entire astounding bounty of products produced in North America. This is only part of what designers can do; the list is endless.