In this book, leading authors in the field discuss development of Ambient Assisted Living. The contributions have been chosen and invited at the 5th AAL congress, Berlin. It presents new technological developments which support the autonomy and independence of individuals with special needs. As the technological innovation raises also social issues, the book addresses micro and macro economical aspects of assistive systems and puts  an additional emphasis  on the ethical and legal discussion. The presentation is supported by real world examples and applications.