Textbook of Usability

Abstract. Tognazzini's principles-of-interaction-design book, published while he was at Apple. Source of the "16 First Principles of Interaction Design" (anticipation, autonomy, color-blindness, consistency, defaults, efficiency of the user, explorable interfaces, Fitts' law, human-interface objects, latency reduction, learnability, metaphor, protect users' work, readability, track state, visible navigation).