xiv Personal Content Experience: Managing Digital Life in the Mobile Age The authors, each with several years of professional experience in mobile personal content, provide clear insight into this new, emerging topic, providing both industrial insight and scholarly analysis. Because the book contains a detailed description of proposed, extensible soft- ware architecture targeted at content management in mobile devices, these essential details will benefi t anyone developing mobile content- intensive applications and services. The authors provide clear and practical guidance to this new fi eld of research and development, making the book applicable to a wide audience, including practitioners in mobile technology and digital content management, media- intensive application developers, content creators and distributors, academic researchers, and faculty in computer science and multimedia. We are entering a new phase in the development of mobile content, applications, and services. This book helps us to see the patterns of this evolution. Aaron Marcus, President, Aaron Marcus and Associates, Inc., Berkeley, California, USA