Indexes hundreds of open access and subscription journals, books from the WorldCat database, conference papers and proceedings, white papers, and other academic materials posted on the Web. Google Scholar is not as comprehensive as many subject databases, but it is useful in that it provides one handy place to search across many different disciplines and subject areas.

Covers: 1800s-. A collection of core journals and books in the humanities, social sciences, sciences, and mathematics. Most journals are digitized back to the first date of issue. Note that most titles in these archival collections are only digitized after a three-to-five-year time lag so that recent issues are not always available through JSTOR.
JSTOR now includes ebooks, images, and primary sources as well as journals.

Covers 1950-. A comprehensive index from the U.S. National Library of Medicine, covering journal articles in all areas of the life sciences, with particular emphasis on biomedicine. Includes all areas of human and veterinary medicine, dentistry, nutrition, toxicology, pathology, public health, and health services administration. MEDLINE is a part of the National Library of Medicine's PubMed information suite.

Covers: 1950-. A service of the National Library of Medicine that includes citations from MEDLINE and biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central and publisher web sites. Offers comprehensive coverage of all areas of human and veterinary medicine, dentistry, nutrition, toxicology, pathology, public health, and health services administration.

Covers 1894-. A definitive source of full-text, peer-reviewed scholarly and scientific articles in psychology from the American Psychological Association (APA).

Covers 1887-. Provides access to the international literature in psychology and related behavioral and social sciences, including psychiatry, sociology, anthropology, education, pharmacology, and linguistics. Indexes journals, as well as books, technical reports, dissertations, and other materials.

Covers: 1945-. Indexes high-impact journals in all disciplines. It allows researchers to determine who has cited whom, to track citations, and to find articles that share many references in common.
Use the "Editions" drop down to limit your search to arts and humanities, social sciences, or sciences.