Provides MEDLINE access, along with OLDMEDLINE, Pre-MEDLINE (citations in-process), and citations outside the scope of MEDLINE provided by journal publishers. Interconnects with other NCBI databases and resources. Articles from many medical journals are free after a 6-12 month embargo. Linkouts to fulltext provided at publishers' discretion. Coverage: OLDMEDLINE, 1950- 1965; MEDLINE, 1966-.