"Authoritative, analytic reviews in 37 focused disciplines within the Biomedical, Life, Physical, and Social Sciences"--publisher's Web site (viewed May 27, 2009).

PubMed is an index to over 5,000 journals in medicine, nursing, dentistry, veterinary medicine, the health care system, and the preclinical sciences, including both basic biomedical sciences and clinical practice. Medical Subject Headings (MeSH) provide a powerful tool for searching topics. Updated daily, covers 1946--present, with some older material.

Web of Science Core Collection provides access to the world's leading citation databases. Authoritative, multidisciplinary content covers journals worldwide, including Open Access journals and conference proceedings. Includes current and retrospective coverage in the sciences, social sciences, arts, and humanities, with coverage to 1900.

xSearch is now called DeepResearch, and will continue to be the place to conduct searches for scientific literature, chemical safety information, and funding resources across many of the databases to which Stanford Libraries subscribes. DeepResearch will focus on science and engineering disciplines and features an interface which is cleaner and easier to navigate. It is an ideal tool for staying up to date on a field of research because with one search you can look across journal abstracts, patents, data deposits and more, and discover which sources may merit a deeper dive..