A frequently asked question (FAQ) is the difference between Medline and Pubmed.
Approximately 5,000 journals published in the United States and more than 80 other countries have been selected and are currently indexed for Medline. A distinctive feature of Medline is that the records are indexed with NLM’s controlled vocabulary, the Medical Subject Headings (MeSH®)
In addition to MEDLINE citations, PubMed also contains:
One of the ways users can limit their retrieval to MEDLINE citations in PubMed is by selecting MEDLINE from the Subsets menu on the Limits screen.
Other PubMed services include:
NLM distributes all but approximately 2% of all citations in PubMed to those who formally lease MEDLINE from NLM.
 MEDLINE (Medical Literature Analysis and Retrieval System Online) is a literature database of life sciences and biomedical information. It includes medicine, nursing, pharmacy, dentistry, veterinary medicine, and health care. MEDLINE covers much of the literature in biology and biochemistry, and fields such as molecular evolution.
 PubMed is a free search engine for accessing the MEDLINE database of citations and abstracts of biomedical research articles. The core subject is medicine, and PubMed covers fields related to medicine, such as nursing and other allied health disciplines. It also provides very full coverage of the related biomedical sciences, such as biochemistry and cell biology. It is offered by the United States National Library of Medicine at the National Institutes of Health as part of the Entrez information retrieval system.
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