"MEDLINE is the U.S. National Library of Medicine® (NLM) premier bibliographic database that contains more than 22 million references to journal articles in life sciences with a concentration on biomedicine. ... Time coverage: generally 1946 to the present, with some older material." (MEDLINE Fact Sheet). Union CC accesses Medline through EBSCOHost, using the EBSCO interface and providing links to some articles not available without subscription. Medline forms a key component of PubMed.
"The subject scope of MEDLINE is biomedicine and health, broadly defined to encompass those areas of the life sciences, behavioral sciences, chemical sciences, and bioengineering needed by health professionals and others engaged in basic research and clinical care, public health, health policy development, or related educational activities. MEDLINE also covers life sciences vital to biomedical practitioners, researchers, and educators, including aspects of biology, environmental science, marine biology, plant and animal science as well as biophysics and chemistry." (MEDLINE Fact Sheet)
"PubMed is a free resource that is developed and maintained by the National Center for Biotechnology Information (NCBI), at the U.S. National Library of Medicine (NLM), located at the National Institutes of Health (NIH)." (PubMed Help)
"PubMed comprises over 25 million citations for biomedical literature from MEDLINE, life science journals, and online books. PubMed citations and abstracts
include the fields of biomedicine and health, covering portions of the life sciences, behavioral sciences, chemical sciences, and bioengineering. PubMed also provides access to additional relevant web sites and links to the other NCBI molecular biology resources." (PubMed Help)