Emulex - Develops, markets and supports high-performance storage networking products for Intel-based server clusters. DeVita Associates - Distributor of Beowulfs and custom failover cluster systems. Product information and white papers about clustering. ParTec - Builds parallel computing clusters from commodity hardware using a high performance communication subsystem. Information about products, downloadable manuals, research papers. The Portland Group - PGI is an independent supplier of high performance scalar and parallel compilers and tools for workstations, servers, and high-performance computing systems. PSP group at UT Austin - PSP stands for Programs, Specifications and Proofs. The emphasis of the work of our group is to derive parallel and distributed programs in a rigorous manner. Dolphin Interconnect - Scalable Coherent Interface adapter cards, bridge chips, switches, and Beowulf kits. Product information, whitepapers, benchmarks, and drivers available for download. TurboLinux Products - Software to turn an existing network of computers into a cluster. Myricom - High-performance networking for cluster communication. Sells interconnect hardware and provides open-source message passing software. Product information, benchmarks, and links to customer research projects.