Common Design Patterns for Symbian OS is the first designpatterns book that addresses Symbian OS specifically. It introducesprogrammers to the common design patterns that help implement alarge variety of applications and services on Symbian OS. The goalof the book is to provide the experience of Symbian's developers toa wider audience and enable sophisticated programs to be quicklywritten and to a high standard. In order to do this, it: Provides patterns based on the Symbian OS architecturalelements Describes how patterns suited for non-mobile software should beadapted or even avoided for Symbian OS Provides Symbian OS based examples and code illustrations Each chapter covers patterns that address specific key concernexperienced by developers: memory performance, time performance,power performance, security and responsiveness. This book is not specific to any particular version of SymbianOS. While individual examples may come from one version or anotherthe patterns outlined in this book are intended to be more genericand based on the common functionality available in all releases.Where possible the examples given for the design patterns willdirectly reflect the software in Symbian OS. Common Design Patterns for Symbian OS is intended to beused in conjunction with one or more SDKs for specific Symbian OSphones and with the resources available at the Symbian DevNet website. This facility will provide the background material needed tohelp understand the patterns and the examples accompanyingthem.