New Entrez Database: NLM Catalog - e2
Providing access to NLM bibliographic data for over 1.2 million books, journals, audiovisuals, computer software, electronic resources, and other materials.
MEDLINE®/PubMed® End-of-Year Activities - e4
Activities include changing MeSH headings on existing MEDLINE citations to agree with the 2005 version of MeSH, changes to Supplementary Concept Substance Names, and other global changes.