Location. 1  The current marker at the exact Four Corners point, placed in 1992. 2  The evolution of the borders that make up Four Corners, beginning in 1850. 3  The borders that make up Four Corners, along with the year each border was officially surveyed and marked.
User experience. User experience (UX) refers to a person's emotions and attitudes about using a particular product, system or service. It includes the practical, experiential, affective, meaningful and valuable aspects of humanâcomputer interaction and product ownership.
user interface - (computer science) a program that controls a display for the user (usually on a computer monitor) and that allows the user to interact with the system. interface. computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures.