National Library of Medicine
Extensive collection of online information for the public and health care professionals dealing with clinical care, toxicology and environmental health, and basic research.
Searchable online database of life sciences and biomedical bibliographic information. Compiled by the U.S. National Library of Medicine (NLM).
National Center for Biotechnology Information (NCBI)
Resource for molecular biology information. Creates public databases, conducts research in computational biology, develops software tools for analyzing genome data, and disseminates biomedical information.