Mobile Computing is an umbrella term used to refer to various devices that enable people to access information and data from anywhere. This book gives directions on how mobile software services can simplify the mobile users' lives. The main contribution of this book is improving mobile software application in development stages as analysis, design, development and test as well as topics such as recent mobile network technologies like algorithms, decreasing energy consumption in mobile network, and fault tolerance in distributed mobile computing. It also deals with mobile software life cycles, human computer interaction discussing mobile device handset design strategies, and mobile application testing strategies. This book also discusses mobile applications as service, covering various mobile solutions and distinct application sectors.