User experience (UX) is the practice of shaping how people interact with digital products, from understanding their needs to designing and evaluating interfaces. This collection brings together names associated with that work, including services for user research and feedback, tools for prototyping and testing, and organizations involved in digital design and development. These areas are closely connected: research helps identify user needs, prototypes make interface ideas tangible, and testing reveals where an experience can be improved. Together, they reflect the collaborative work behind making digital products understandable and useful.