Book excerpt: This book constitutes the refereed proceedings of the 12th IFIP TC 9 International Conference on Human Choice and Computers, HCC12 2016, held in Salford, UK, in September 2016. The 26 revised full papers presented were carefully reviewed and selected from 34 submissions. The papers deal with the constantly evolving intimate relationship between humans and technology. They focus on three main themes: ethics, communications, and futures.