Steven K. Feiner (Ph.D., Brown University) is Associate Professor of Computer Science at Columbia University, where he directs the Computer Graphics and User Interfaces Lab. His current research focuses on 3D user interfaces, virtual worlds, augmented reality, knowledge-based design of graphics and multimedia, animation, visualization, and hypermedia. Dr. Feiner is on the editorial boards of ACM Transactions on Graphics, IEEE Transactions on Visualizations and Computer Graphics, and Electronic Publishing, and is on the executive board of the IEEE Technical Committee on Computer Graphics. He is a member of ACM SIGGRAPH and the IEEE Computer Society. In 1991 he received an ONR Young Investigator Award. Dr. Feiner's work has been published in over fifty papers and presented in numerous talks, tutorials, and panels.