www.cpst.org The Commission on Professionals in Science and Technology (CPST), a clearinghouse for data on professionals in the sciences, has updated its "Guide to Data on Scientists and Engineers" and posted it on its Web site. This is a comprehensive, one-stop guide to published and unpublished datasets for researchers, employers, policy makers, and others interested in the human resources of the United States as it relates to science and engineering. Information is available on scientists and engineers by individual field; participation of women and minorities; aging of the workforce; and many other areas. Users can search more than 130 publications and surveys. The Web version, which draws on resources from nearly 40 professional society, government, nonprofit, and for-profit sources, updates a paper version that was first published in 1984, and is funded by a grant from the National Science Foundation. Updates will occur on a quarterly basis.