MEDLINE is the authoritative bibliographic database of The National Library of Medicine, delivering comprehensive scientific records to articles in the life and biomedical sciences. The coverage of material is extensive and international in scope.

PubMed Central is an open-access digital archive of full-text journals in the biomedical and life sciences from the US National Institutes of Health (NIH). Free and unrestricted access to biomedical literature is the objective of the database.

Some journals may delay release of their full-text issues in the database for a certain period of time after publication.

SpringerLink is a multidisciplinary database of full-text, scholarly literature. Publication types include academic journals, book and book series, and reference texts. The database covers a large scope of subjects from the humanities to the biomedical and clinical sciences. Searches may be performed within a specific title. Users may also search the database’s extensive collection by subject group or content type—allowing users to retrieve material from several sources.