Despite the massive growth of mobile technologies, very little research has been done on how these technologies influence human interaction. Most of the published work in this area focuses on technological aspects and not on the social implications the technology is having on society. This book aims to fill this gap by providing an overview of these issues. It identifies the major trends, discusses the main claims made about the mobile age, and looks at issues which affect design, usability and evaluation. This unique look at the mobile age provides many interesting and important insights and will appeal to anyone designing, testing, or studying mobile devices.