PubMed is
a Web-based retrieval system developed by the National Center
for Biotechnology Information (NCBI) at the National Library of
Medicine. It is part of NCBI's vast retrieval system, known as
Entrez.
PubMed is
a database of bibliographic information drawn primarily from the
life sciences literature.
PubMed contains
links to full-text articles at participating publishers' Web sites
as well as links to other third party sites such as libraries
and sequencing centers.
PubMed provides
access and links to the integrated molecular biology databases
maintained by NCBI.
The diagram illustrates the relationships between some of the information
resources in Entrez.