Mike Folk from the National Center for Supercomputing Applications gave an update on HDF software in 2003. HDF is supported by several government agencies for applications in earth science, simulations, and data-intensive computing. Version 4.2 Release 1 was planned for October 2003 with bug fixes and new features. HDF5 1.6.0 was released in July 2003 with new filters, properties, and performance improvements. Work was also being done on high-level APIs, parallel HDF5, tools, and collaborations with other projects.