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This tutorial uses design patterns to present techniques for implementing effective and efficient resource management in a system. The tutorial is based on the third volume of the POSA (pattern-oriented software architecture) series. The tutorial presents a thorough introduction to resource management along with two case studies in which the patterns are applied to the domains of ad hoc networking and mobile radio networks. The presented patterns are independent of any implementation technique, such as .NET, Java or C++, even though the examples are given in Java and C++. The patterns are grouped by different areas of resource management and address the complete lifecycle of resources: acquisition, management, and release.