Communication design focuses on delivering messages, and it encompasses most graphic design, signage, and communicative objects of all kinds, from printed materials to three-dimensional and digital projects. Interface and interaction design, which is sometimes brought under the more generic and functionalist rubric of user-experience design, delineates the behavior of products and systems, as well as the experience that people will have with them. Information or visualization design includes the maps, diagrams, and visualization tools that filter and make sense of the enormous amount of information that is more widely available than ever before. Critical design is one of the most promising and far-reaching new areas of study, using conceptual scenarios built around hypothetical objects to comment on the social, political, and cultural consequences of new technologies and behaviors. Its disciples are experts in ‘What if?’