A general, introductory, up-to-date text on the interface between people and systems, geared for the advanced undergraduate or graduate major in psychology, industrial engineering, computer science, and business. Integrates theory and practical implications of human behavior in terms of theoretical models. Covers non-traditional contemporary topics and uses a detailed description of human capabilities as a necessary precursor to the study of human-machine systems. Emphasizes the cognitive aspects of the person-system relationship.