The first volume of the POSA pattern series introduced a broad-spectrum of general-purpose patterns in software design and architecture. The second volume of the POSA pattern series narrowed the focus to fundamental patterns for building sophisticated concurrent and networked software systems and applications. This volume uses design patterns to present techniques for implementing effective resource management in a system. The patterns are covered in detail making use of several examples. Similar to previous POSA volumes, this volume provides directions to the readers on how to implement the presented patterns. Additionally, the volume presents a thorough introduction into resource management and a case study where the patterns are applied to the domain of 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 hence address the complete lifecycle of resources: resource acquisition, coordination and release.