110 SMArT ThIngS: UBIqUIToUS CoMpUTIng USer experIenCe DeSIgn 8.2.4 Hybrid AvAtArs These avatar designations (porthole, handle, slice) create distinctions between roles, but do not define hard boundaries in terms of how devices actually work. In practice, many devices take on multiple roles, depending on the context, people's needs, and the goals of the organization creating them. A gpS navi- gation device that also plays games, movies, music, and provides Internet access, for exam- ple, is closer to a handle in navigation mode, but also exhibits porthole-like characteristics in the Web browser that shows live traffic updates. As with all classification systems, most devices exist in gray areas where multiple avatar desig- nations overlap.