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In future networks, mobile computers will become increasingly important. Distributed, mobile applications enable information access anywhere, anytime. Mobility, location independence and adequate information access will be supported simultaneously. Major problems due to mobility and the specific characteristics of portable computers and wireless communications are dynamic configuration, moving resources, reachability, data and functional consistency. In this paper we present a system caUed MOBI-DICK that addresses the problems of mobile computing. The requirements and solutions for service mobility are described in detail.