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PubMed is a service of the U.S. National Library of Medicine that includes over 17 million citations from MEDLINE and other life science journals for biomedical articles back to the 1950s. PubMed includes links to full text articles and other related resources'.[1]

(PD) Photo: National Center for Biotechnology Information
June 26, 1997: The first search of PubMed by Vice President Al Gore at the US Capitol.[2]

PubMed ( is the National Library of Medicine's own free Internet access to MEDLINE. PubMed has been freely available since its first search was performed by Vice President Al Gore during a press conference in the US Capitol on June 26, 1997.[2] On a typical day, PubMed receives over 2 million queries.[3]

PubMed is hosted by the Entrez Search and Retrieval System of the National Center for Biotechnology Information[4] (NCBI) branch of the NLM[5] The hardware hosting Entrez has been described.[6]


Related articles

The "Related articles" feature uses relevance feedback to revise search results.[7][8]


  1. PubMed Home. Retrieved on 2007-12-31.
  2. 2.0 2.1 National Center for Biotechnology Information. NCBI News - August 1997. Retrieved on 2007-11-09. Cite error: Invalid <ref> tag; name "aug97" defined multiple times with different content
  3. Herskovic JR, Tanaka LY, Hersh W, Bernstam EV (2007). "A day in the life of PubMed: analysis of a typical day's query log". J Am Med Inform Assoc 14 (2): 212–20. DOI:10.1197/jamia.M2191. PMID 17213501. Research Blogging.
  4. National Library of Medicine. The National Center for Biotechnology Information Programs and Activities Fact Sheet. Retrieved on 2007-11-10.
  5. Ostell, J. The Entrez Search and Retrieval System. Retrieved on 2007-11-10.
  6. Canese, K; Jentsch, J; Myers, C. Database Management and Hardware. Retrieved on 2007-11-10.
  7. Anonymous (October 23, 2009) Computation of Related Articles. National Center for Biotechnology Information
  8. Lin J, Wilbur WJ (2007). "PubMed related articles: a probabilistic topic-based model for content similarity.". BMC Bioinformatics 8: 423. DOI:10.1186/1471-2105-8-423. PMID 17971238. PMC PMC2212667. Research Blogging.

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