|PubMed vs OVID Medline|
PubMed = Public Medline
MEDLINE is the largest component of PubMed (http://pubmed.gov/), the freely accessible online database of biomedical journal citations and abstracts created by the U.S. National Library of Medicine (NLM®). In addition to MEDLINE citations, PubMed also contains, among other items, 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. More information here.