A free search engine for accessing the medline database .-pubmed is a free search engine for accessing the medline database of citations, abstracts and some full text articles on life sciences and biomedical topics. the united states national library of medicine at the national institutes of health maintains pubmed as part of the entrez information retrieval system. listing an article or journal in pubmed is not endorsement. in addition to medline, pubmed also offers access to* oldmedline for pre-1966 citations. this has recently been enhanced, and records for 1951+, even those parts in the printed indexes, are now included within the main portion.* citations to all articles, even those that are out-of-scope (e.g., covering plate tectonics or astrophysics) from certain medline journals, primarily the most important general science and chemistry journals, from which the life sciences articles are indexed for medline.* in-process citations which provide a record for an article before it is indexed with mesh and added to medline or converted to out-of-scope status.* citations that precede the date that a journal was selected for medline indexing (when supplied electronically by the publisher).* some life science journals that submit full text to pubmed central and may not have been recommended for inclusion in medline although they have undergone a review by nlm, and some physics journals that were part of a prototype pubmed in the early to mid-1990s.
