This book, Ageing and Invisibility, is the result of two years of research and part of the European Union (EU) FP7 project SENIOR (social, ethical and privacy needs in ICT for older people). The project was initiated to provide a systematic assessment of the social, ethical and privacy issues surrounding the use of computers and information technology for and by an ageing population. The direction of demographic change is clear in many societies worldwide: the population is ageing rapidly. By 2050 the number of people over 50 is expected to have increased by 35%, and those over 80 by a stagger.