Multimodal + multimedia + sensors = pleasant interfaces

If the computer is a machine to help humans, its functions should be completely useful, otherwise it is ineffectual, despite containing several powerful functions. Thus, interface development is an essential issue. We discuss the idea of a pleasant interface in this paper. The pleasant interface does not require much effort while using the computer and operates in the background. In addition, this interface helps humans do a thing which is worth doing. In this study, trials conducted in a laboratory are explained as a step toward realizing pleasant interfaces, which include multidip aquatic interface, spatial auditory, and gait interface systems.