This document discusses user interface (UI) and user experience (UX) design. It defines UI as what the user sees (controls, layout) and UX as how the user feels (steps in a process, wait times, shifts in attention). It emphasizes that UX design is important and measurable, not subjective, and outlines some principles for designing good UX, such as ensuring tasks are easy, frequent and purpose is obvious. It also provides tips for evaluating UX through a user's eyes and examples of colors and their symbolic meanings.