Forecasting the impact of new technology is always difficult. Occasionally demand is underestimated, but more often it is overestimated, & at great cost. Digital technology is unlike anything that has gone before, making it particularly difficult to understand its implications for businesses, public services & society in general. By looking at what has happened in the past & now, & offering methods of using this knowledge to look forward, this book will contribute to reducing expensive forecasting errors in the future. Key reading for all those involved with the future of mobile communications, this book is a valuable resource, particularly for advanced undergraduates & postgraduates on Mobile Technology courses, practitioners, & researchers working in mobile communications, CSCW & HCI.