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Structured Abstracts
Information about abstracts with distinct, labeled sections (e.g., Introduction, Methods, Results, discussion) that appear in MEDLINE. -
MeSH Qualifiers with Scope Notes
Listed below are MeSH Topical Qualifiers listed by Name, Abbreviation, and Short Form. Each Qualifier is defined by a Scope Note that provides guidance on how it should be used. -
Annual MeSH Processing (AMP)
An overview of Annual MeSH Processing (AMP) for MeSH/MEDLINE, including downloadable datasets detailing changes to MeSH -
MeSH 2024 Update - Split Report
(Includes MeSH 2023 changes) The MeSH 2024 Update - Split Report lists terms that are replaced by a set of terms, either descriptors or SCRs, instead of a single term. This... -
MeSH 2025 Update - Update All Fields Report
(Includes MeSH 2023 and 2024 changes) The MeSH 2025 Update - Update (All Fields) Report lists each individual modification made to a Descriptor or Supplementary Concept Record... -
NCBI C++ Toolkit Book
Provides an overview of the C++ language with a focus on its use in accessing resources of the National Center for Biotechnology Information at the National Library of Medicine,... -
MeSH 2025 Update - Merge Report
(Includes MeSH 2023 and 2024 changes) NOTE - There are no Merges for 2025 MeSH. The MeSH 2025 Update - Merge Report describes cases where two or more terms have merged into a... -
UniGene archived data (RETIRED)
An automated analytical system for producing organized views of the transcriptome from a growing number of organisms. UniGene was retired in July 2019; however, you will... -
Health Services Research Information Central (HSRIC)
Health Services Research Information Central (HSRIC) is a web portal and current awareness service of information on health services research. Alerts the communities to... -
Health Services Research Projects in Progress (HSRProj)
The Health Services Research Projects in Progress (HSRProj) was a dataset of ongoing health services research and public health projects containing descriptions of research in... -
Nucleotide
The Nucleotide database is a collection of sequences from several sources, including GenBank, RefSeq, TPA and PDB. Genome, gene and transcript sequence data provide the... -
Database of Genomic Structural Variation (dbVar)
Database of Genomic Structural Variation (dbVar) is NCBI's database of human genomic Structural Variation — large variants >50 bp including insertions, deletions,... -
HomoloGene
System for automated detection of homologs among the annotated genes of several completely sequenced eukaryotic genomes. -
E-utilities (Entrez Programming Utilities)
E-utilities (Entrez Programming Utilities) are a set of eight server-side programs that provide a stable interface into the Entrez query and database system at the National... -
FDA Notices of Judgment Collection, 1908-1966
A digital archive of the published federal notices of judgment (a summary of the final outcome of a court case) for manufacturers and products prosecuted under authority of the... -
NCBI Submission Portal
A single entry point for users to link to and find information about data submission processes at NCBI. -
NCBI Learn
NCBI creates a variety of educational products including courses, workshops, webinars, training materials and documentation. NCBI educational events are free and open to...