PubMed is one interface for searching the National Library of Medicine's MEDLINE database of biomedical citations. MEDLINE includes over 15 million citations dating back to 1966, from nearly 4,600 biomedical journals. Seventy six percent of the citations contain author-provided abstracts. Articles in over 40 languages, from over 70 countries, are included. The National
Institute of Health charters a committee, the Literature Selection Technical Review Committee, which selects the journals to be included in MEDLINE. The National Library of Medicine assigns the MeSH (Medical Subject Heading) terms, although abstracts are often available in PubMed before the MeSH headings have been assigned. PubMed does include some citations that are out of scope for MEDLINE, generally citations provided by publishers. PubMed also includes protein and genome sequence searching. The easiest address to remember is www.pubmed.gov.