“Whether we’re communicating with a human or a machine, the goal is to create a shared understanding of the world. That’s the point behind both the rules governing polite conversation and how a user-friendly machine should work.” DesignUser ExperienceDesign ThinkingUser FriendlyHuman Computer Interaction Book:User Friendly: How the Hidden Rules of Design Are Changing the Way We Live, Work, and Play Source: User Friendly: How the Hidden Rules of Design Are Changing the Way We Live, Work, and Play