“Human-computer interaction as a field of inquiry necessarily evolves in response to changes in the technological landscape. During the past 15 years, the speed of change has been particularly dramatic, with the emergence of personal mobile devices, agent-based technologies, and pervasive and ubiquitous computing. Social networking has also profoundly changed the way people use technology for work and leisure. Who would have predicted a decade ago that (smart)phones would offer constant access to the Web, to social networks and broadcast platforms like Facebook and Twitter, and to hundreds of specialized apps? Who could have anticipated the power of our everyday devices to capture our every moment and movement? Cameras, GPS tracking, sensors—a phone is no longer just a phone; it is a powerful personal computing device loaded with access to interactive services that you carry with you everywhere you go.”

(Elizabeth Churchill, Anne Bowser, and Jennifer Preece ~ Interactions March-April 2013)