The Human–Computer Interaction Lab (HCIL) at the University of Maryland, College Park is one of the oldest and longest running HCI labs in the world. Founded in 1983 by Ben Shneiderman, HCIL designs, implements, and evaluates new computer interface technologies, and develops user interfaces and design methods. Primary activities include collaborative research, publication and the sponsorship of open houses, workshops and symposia. The HCIL is an interdisciplinary lab with faculty and students from Information Studies, Computer Science, Education, English, Business, and Psychology. Work includes new approaches to information visualization, interfaces for digital libraries, multimedia resources for learning communities, and zooming user interface (ZUIs). HCIL pioneered technology design methods with and for children, mobile and pen-based computing, and instruments for evaluating user interface technologies. Its projects are showcased at the annual Human-Computer Interaction Lab Symposium.