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RT (robot technology) is expected to magnify the IT industry, which is characterized by the real time operation in the physical environment. Especially, integration of RT with ubiquitous computation technology makes a big impact on service industry. In this presentation, a concept of service media for ubiquitous service RT in the context of service engineering is introduced, which provides users with various services in a ubiquitous computing environment. Examples of ubiquitous RT devices called intelligent data carrier, and their application to user adaptive systems, rescue systems, and security systems are introduced.