This volume presents the proceedings of the Fourth International Symposium on Parallel Architectures, Algorithms, and Networks (I-SPAN'99), held in June 1999. The symposium gathered researchers and practitioners to discuss advancements in the design, utilization, analysis, and application of parallel computing systems. The papers cover a wide array of topics critical to the field, including routing, scheduling, object-oriented systems, interconnection networks, distributed systems, fault tolerance, architecture, algorithms, performance evaluation, and mapping.

This collection of papers from the I-SPAN'99 symposium offers a snapshot of the state of parallel architectures, algorithms, and networks in 1999. The breadth of topics covered, from fundamental scheduling and routing to advanced distributed and mobile computing, indicates a comprehensive overview of the field at that time. The inclusion of papers on fault tolerance and performance evaluation suggests a focus on practical and robust system design. While lacking a subject index, the detailed sectioning provides a structured approach to the presented research.