The much-anticipated fourth edition of Designing the User Interface provides a comprehensive, authoritative introduction to the dynamic field of human-computer interaction (HCI). Students and professionals learn practical principles and guidelines needed to develop high quality interface designs ones that users can understand, predict, and control. It covers theoretical foundations, and design processes such as expert reviews and usability testing. Numerous examples of direct manipulation, menu selection, and form fill-in give readers an understanding of excellence in design. Recent innovations in collaborative interfaces, online help, and information visualization receive special attention. A major change in this edition is the integration of the World Wide Web and mobile devices throughout the book. Chapters have examples from cell phones, consumer electronics, desktop displays, and Web interfaces.