B:
Biodefense and Bioterrorism - Include links from different organizations and government agencies on all you need to know about biodefense and bioterrorism. [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

Biological Systems (ORNL) - Draws on programs in comparative and functional genomics, structural biology, and computational biology and bioinformatics [Department of Energy (DOE), Oak Ridge National Laboratory (ORNL)]

L:
LOCATORPlus - Catalog of books, journals, and audiovisuals in the National Library of Medicine collections [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

M:
MEDLINE/PubMed - Database with millions of references, primarily from MEDLINE, to journal articles in life sciences with a concentration on biomedicine [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), National Center for Biotechnology Information (NCBI)]

U:
Unified Medical Language System (UMLS) - Electronic Knowledge Sources and lexical programs that help health professionals and researchers retrieve and integrate electronic biomedical information from a variety of sources [Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), Lister Hill National Center for Biomedical Communications (LHNCBC)]