These proceedings of the fourth Austrian-Hungarian Workshop on Distributed and Parallel Systems highlight advances in cluster tools and techniques, grid and global computing, general questions of distributed development and applications, and fault tolerance and dependable systems. Some specific topics examined include data intensive computation on a cluster, information system architecture for brokering in large scale grids, interactive virtual reality volume visualization on the grid, and stop failures in distributed Maple. There is no subject index. Annotation (c)2003 Book News, Inc., Portland, OR