This fourth volume of papers from the 10th International Conference on Human-Computer Interaction -- which brought together the contributions of nearly 3000 individuals -- focuses on the trends and developing applications that are beginning to move the information age towards a state of universal accessibility. Applying concepts from a variety of fields including cognitive ergonomics and engineering psychology, this cutting-edge volume considers a wide range of diversity issues and covers various facets of access, detailing a number of current and developing assistive technologies, including non-visual interaction devices. This volume is available individually or as part of a four volume set covering most every aspect of human-computer interaction, including those in construction, manufacturing, publishing, and health.