Interaction design (IxD) is a professional discipline that illuminates the relationship between people and the interactive products they use. While interaction design has a firm foundation in the theory, practice, and methodology of traditional design, its focus is on defining the complex dialogues that occur between people and interactive devices of many types—from computers to mobile communications devices to appliances.Interaction design (IxD) is a professional discipline that illuminates the relationship between people and the interactive products they use. While interaction design has a firm foundation in the theory, practice, and methodology of traditional design, its focus is on defining the complex dialogues that occur between people and interactive devices of many types—from computers to mobile communications devices to appliances.