Everyone should read this chapter. Input Models describes the input model. New widget designers and user interface system designers should read this chapter. Navigation describes the navigation model. New widget designers and user interface system designers should read this chapter.
Selection describes the selection model.
New widget designers and user interface system designers should read this chapter. Component Activation describes the activation model. New widget designers and user interface system designers should read this chapter. Application Design Principles describes user interface component choices, layout, and interaction. Everyone should read this chapter.