Foreword In the early days of cinema, its inventors produced simple film clips. Because little was known about people's perceptions, behaviors, expectations, and reactions, the field did not go far. The maturation of film as a medium occurred only when engineers and scientists began to work hand in hand with designers and artists to achieve a balance between science, engineering, and art. Like early film, today's many new technologies do not exist in a vacuum. Rather, they powerfully affect people at work, at home, and on the street both individually and socially, impacting the way we interact with each other, the way we design and construct our buildings and cities, and the way we conduct daily life. However, many of these technologies are not well designed for the masses and many are imple- mented without fully taking into account the way people perceive and interact with information, and how their use may influence social behavior. This renders them much less effective than they could be. Because of the pervasive nature and encompassing character of technologies that interface with people in different daily life environments, those who design, develop, and implement them have an important--and unprecedented--responsibility to incorporate user concerns and behavior norms in their design, development, and implementation efforts. Technologists are good in their respective areas, such as writing code and designing systems, but they generally do not have the necessary