Rehabilitation medicine and rehabilitation technology resulting in products and services for disabled people already have a long history and gerontechnology can use these results to find solutions for the general consumer market. This book is useful for life-span development/gerontology classes, as well as higher education such as in the realms of anthropology, human factors/ergonomics, lifelong education, mass media, or medical disciplines including nursing, and the information and communication sciences. Providing care to ill and/or frail elders can challenge the entire caregiving team, including the family technologist. Technologically mediated social interaction introduces its own ethical concerns, including technical security, information privacy, risks associated with failure of one or more components of the service, and changes to the social system in which they are embedded. The book draws attention to virtual environments (VEs) as a research method to study older people’s behavior, in particular in aging mobility studies. The trends of aging societies necessitated ever-increasing needs for information and communication technology (ICT)-related gerontological studies. The Internet of Things (IoT), social networking services (SNS), and big data are at the core of information and communication technologies for health care. Light reflectance value (LRVs) are used to determine value contrast between an object and its background. The book includes a brief description of smart home development, with some well-known university-based examples in the United States, Europe, and Japan. The role of assistive technology (AT) in terms of managing long-term chronic conditions, quality of life (QoL) and health, telecare (TC), and electronic assistive technology (EAT) is also discussed.