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The vision behind the personal environment service is that of recreating a user's customized living or working surroundings in accordance with user-defined settings and in response to the user's mobility. Concepts such as ambient intelligence and home networks could be instrumental in realization of PES. Indeed, integration of elements of these technologies may attract industrial attention and support, which in turn may speed up the implementation and deployment of PES. Moreover, underlying technologies related to the above concepts are envisioned to play a key role in the realization of PES, including mobile communications supported by ubiquitous infrastructure and wireless personal area networks. In this article we present a simple PES network architecture and its underlying network technologies, and we discuss a set of potential services of PES. We also compare PES with other related concepts capable of supporting the PES vision.