At the UseX Lab, we study the evolving relationship between human users and computing systems or emerging technologies, collectively referred to as "X." Grounded in a human-centered philosophy, our mission is to ensure that technology adapts to humans, not the other way around. By examining how users interact with X, we aim to inspire innovative design, improve existing frameworks, and develop technologies that foster learning, enrich lives, and empower individuals to reach their full potential in an increasingly interconnected world. We pursue this mission by designing and building systems and tools that are intelligent, responsive, and inclusive of a broad and diverse audience.