NLM electronic resources

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Resources	Subject Terms	Data/Tools	Information Resources	Communication
AccessGUDID The Global Unique Device Identification Database (GUDID) contains key device identification information submitted to the FDA about medical devices that have Unique Device Identifiers (UDI).	Technology	Encoded Data (e.g. HTML, XML, MARC), Utilities/Tools/EXE	Database
AIDSInfo U.S. Department of Health and Human Services (HHS) resource providing information on HIV/AIDS clinical trials and federally approved HIV treatment and prevention guidelines, information on HIV/AIDS treatment, clinical trials, and other HIV/AIDS-related research information for health care providers, researchers, people affected by HIV/AIDS, and the general public.	Acquired Immunodeficiency Syndrome		Database, Multilanguage, Special Interest	E-mail/Listserv/GovDelivery/RSS, Web 2.0/Social Media
AIDSInfo API Provides access to the AIDSinfo drug database fact sheets in XML format. The API returns information from both the professional and patient versions of the AIDSinfo drug database fact sheets based on input query strings.	Acquired Immunodeficiency Syndrome	API
AIDSInfo HIV/AIDS Glossary The AIDSinfo HIV/AIDS Glossary is a powerful tool that provides mobile access to over 850 pertinent HIV/AIDS glossary terms in both English and Spanish.	Acquired Immunodeficiency Syndrome; Terminology as Topic	Downloadable Files (e.g. TXT, PDF), Mobile/Apps/Widgets	Reference
AIDSource Comprehensive listing of HIV/AIDS resources within and outside of NLM.	Acquired Immunodeficiency Syndrome	Downloadable Files (e.g. TXT, PDF)	Database, Reference, Special Interest, Training	Web 2.0/Social Media
Alternatives to Animal Testing Bibliography (ALTBIB) Bibliography on alternatives to the use of live vertebrates in biomedical research and testing.	Animal Testing Alternatives; Toxicology	Downloadable Files (e.g. TXT, PDF)	Database, Reference
American Indian Health Health and well-being of American Indians.	Ethnic Groups; Public Health	Downloadable Files (e.g. TXT, PDF)	Database, Special Interest	Web 2.0/Social Media
Amino Acid Explorer Explore characteristics of amino acids by comparing their structural and chemical properties, predicting protein sequence changes caused by mutations, viewing common substitutions, and browsing functions of given residues in conserved domains.	Amino Acids; Biochemistry	Utilities/Tools/EXE
Arctic Health Health and well-being of our planet's northern-most inhabitants.	Ethnic Groups; Public Health	Downloadable Files (e.g. TXT, PDF)	Database, Special Interest	Web 2.0/Social Media
Asian American Health Health and well-being of Asian Americans in the United States.	Ethnic Groups; Public Health	Downloadable Files (e.g. TXT, PDF)	Database, Multilanguage, Special Interest
ASN.1 Format Summary An International Standards Organization (ISO) data representation format used to achieve interoperability between platforms.	Technology	Utilities/Tools/EXE
Assembly Archive Links the raw sequence information found in the Trace Archive with assembly information found in publicly available sequence repositories (GenBank/EMBL/DDBJ). The viewer shows the multiple sequence alignments and the actual sequence chromatogram.	Genetics	Utilities/Tools/EXE	Database
Batch Entrez Retrieve records from Entrez databases by uploading a file of GI or accession numbers from the Nucleotide or Protein databases, or a file of unique identifiers from other Entrez databases. Save results in various formats.	Computational Biology	Utilities/Tools/EXE
BioAssay Services Tools that summarize the biological test results in the PubChem database and provide alternative ways to view bioassay results and structure-activity relationships. Users also can download their analyses and data tables.	Biochemistry; Biological Assay	Utilities/Tools/EXE
BioSample Database containing descriptions of biological source materials used in experimental assays.	Biochemistry; Biological Assay		Database
BioSystems Database grouping biomedical literature, small molecules, and sequence data in terms of biological relationships.	Computational Biology		Database
Biotechnology Information Molecular biology, computational biology and related software tools.	Biotechnology	FTP	Database	E-mail/Listserv/GovDelivery/RSS
BLAST (Basic Local Alignment Search Tool) Find regions of local similarity between sequences and compare nucleotide or protein sequences to sequence databases and calculate the statistical significance of matches.	Computational Biology		Database
BLAST (Basic Local Alignment Search Tool) Tutorials and Guides Includes links for a selection guide for BLAST algorithms, descriptions of BLAST output formats, explanations of the parameters for stand-alone BLAST, directions for setting up stand-alone BLAST on local machines and using the BLAST URL API.	Computational Biology	Utilities/Tools/EXE	Training	E-mail/Listserv/GovDelivery/RSS
BLAST (Stand-alone) Suite of BLAST tools that utilize the NCBI C++ Toolkit.	Biotechnology; Computational Biology	FTP, Utilities/Tools/EXE	Database
BLAST API API for Basic Local Alignment Search Tool (BLAST) services which find regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches.	Biotechnology; Computational Biology	API
BLAST Databases Sequence databases for use with the stand-alone BLAST programs. The files in this directory are pre-formatted databases that are ready to use with BLAST.	Biotechnology; Computational Biology	FTP	Database
BLAST Link (BLink) A link option on protein records that displays the results of a pre-computed BLAST search of that protein against all other protein sequences at NCBI.	Biotechnology; Computational Biology	Utilities/Tools/EXE
BLAST Microbial Genomes Performs a BLAST search for similar sequences from selected complete eukaryotic and prokaryotic genomes.	Computational Biology; Genomics; Microbiology	Utilities/Tools/EXE
Bookshelf A collection of online biomedical books whose full text can be searched through the Entrez system.	Books; Medicine		Database, Reference	E-mail/Listserv/GovDelivery/RSS
CDTree A stand-alone application for classifying protein sequences and investigating their evolutionary relationships. CDTree can import, analyze and update existing Conserved Domain (CDD) records and hierarchies, and also allows users to create their own.	Proteomics	Utilities/Tools/EXE
Chemical Carcinogenesis Research Information System (CCRIS) Carcinogenicity, mutagenicity, tumor promotion, and tumor inhibition test results on chemicals.	Neoplasms; Toxicology		Database	E-mail/Listserv/GovDelivery/RSS
Chemical Hazards Emergency Medical Management (CHEMM) Enables first responders and other healthcare providers and planners to plan for, respond to, recover from, and mitigate the effects of mass-casualty incidents involving accidental or terrorist chemical releases.	Disasters; Emergency Medicine; Hazardous Substances	Downloadable Files (e.g. TXT, PDF), Mobile/Apps/Widgets	Database, Special Interest, Training	E-mail/Listserv/GovDelivery/RSS
Chemical Identification Plus Database (ChemIDplus) Online dictionary of chemicals, including names, synonyms, and chemical structures.	Chemistry; Terminology as Topic	Encoded Data (e.g. HTML, XML, MARC)	Database, Reference	E-mail/Listserv/GovDelivery/RSS
ChemSpell Web Service API The ChemSpell Web Service API provides chemical name spell checking and chemical name synonym look-up.	Chemistry; Terminology as Topic	API	Reference
Citing Medicine Provides guidance for citing twenty-six types of published and unpublished material, ranging from print books and journal articles to blogs and wikis.	Books; Medicine		Reference
Clinical Alerts Messages provided to expedite the release of findings from the NIH-funded clinical trials where such release could significantly affect morbidity and mortality.	Clinical Trials as Topic			E-mail/Listserv/GovDelivery/RSS
ClinicalTrials.gov Patient studies for drugs and treatment.	Clinical Trials as Topic		Database, Special Interest, Training
ClinicalTrials.gov API Method for creating links to ClinicalTrials.gov or downloading data in XML format. Information includes a trial's purpose, who may participate, locations, and contact information for details about trials conducted in the U.S. and around the world.	Clinical Trials as Topic	API
ClinVar A resource under development to provide a public, tracked record of reported relationships among human variation and observed health status.	Genetics	Downloadable Files (e.g. TXT, PDF), FTP, Submission Systems	Database	E-mail/Listserv/GovDelivery/RSS
CloneDB (formerly Clone Registry) A database that integrates information about clones and libraries, including sequence data, map positions and distributor information.	Biotechnology; Genetics	FTP, Utilities/Tools/EXE	Database
Cn3D A stand-alone application for viewing 3-dimensional structures from NCBI Entrez retrieval service. Runs on Windows, Macintosh, and UNIX and can be configured to receive data from most popular Web browsers.	Molecular Biology	Utilities/Tools/EXE	Training
COBALT COBALT is a protein multiple sequence alignment tool that finds a collection of pairwise constraints derived from conserved domain database, protein motif database, and sequence similarity, using RPS-BLAST, BLASTP, and PHI-BLAST.	Proteomics	Utilities/Tools/EXE
Coffee Break A collection of short stories and interactive tutorials about recent biomedical discoveries.	Medicine		Database, Training
Community Health Maps Low cost and easy-to-use mapping and mobile communication tools.	Geographic Information Systems; Technology	Mobile/Apps/Widgets		Web 2.0/Social Media
Comparative Toxicogenomics Database (CTD) Contains manually curated data describing cross-species chemical-gene/protein interactions and chemical-and gene-disease relationships.	Environmental Health; Genomics; Toxicology		Database
Computational Photography Project for Pill Identification (C3PI) RxImage Access RESTful API A developing information infrastructure for identifying unknown oral solid dosage pharmaceuticals (pills) to generate a comprehensive portfolio of digital images of those pills along with supplementary metadata for computer vision research.	Pharmaceutical Preparations	API	Images
Computational Resources from NCBI Structure Group A centralized resource covering databases and tools to help in the study of macromolecular structures, conserved domains and protein classification, small molecules and their biological activity, biological pathways, and systems.	Computational Biology	Utilities/Tools/EXE	Database
Concise Microbial Protein BLAST A specialized BLAST service in which the queried database consists of all proteins from complete microbial (prokaryotic) genomes.	Computational Biology; Microbiology; Proteomics	Utilities/Tools/EXE
Consensus CDS (CCDS) A collaborative effort to identify a core set of human and mouse protein coding regions that are consistently annotated and of high quality.	Genetics; Proteomics	FTP	Database
Conserved Domains Database (CDD) Collection of sequence alignments and profiles representing protein domains conserved in molecular evolution.	Computational Biology; Proteomics	FTP	Database
DailyMed Vehicle for access to the labels as well as to other sources and types of information about medications.	Pharmaceutical Preparations	Downloadable Files (e.g. TXT, PDF)	Database, Images	E-mail/Listserv/GovDelivery/RSS
DailyMed API Provides high quality information about marketed drugs, including FDA labels (package inserts). Currently DailyMed publishes “RESTful” API for querying DailyMed database.	Pharmaceutical Preparations	API
DailyMed Mobile Provides high quality information about marketed drugs, including FDA labels (package inserts).	Pharmaceutical Preparations	Mobile/Apps/Widgets	Database
Database of Expressed Sequence Tags (dbEST) A division of GenBank that contains short single-pass reads of cDNA (transcript) sequences. dbEST can be searched directly through the Nucleotide EST Database.	Expressed Sequence Tags; Genetics; Polymerase Chain Reaction		Database
Database of Genome Survey Sequences (dbGSS) A division of GenBank that contains short single-pass reads of genomic DNA. Can be searched directly through the Nucleotide GSS Database.	Genomics		Database
Database of Genomic Structural Variation (dbVar) The dbVar database archives information associated with large scale genomic variation, including large insertions, deletions, translocations and inversions. dbVar also stores associations of defined variants with phenotype information.	Genomics		Database
Database of Genotype and Phenotype (dbGaP) Data from genome wide association (GWA) studies, which aim to establish associations between genotype and phenotype information to elucidate the link between genes and disease.	Genetics	Datasets/XLS/CSV, FTP, Submission Systems	Database	E-mail/Listserv/GovDelivery/RSS
Database of Major Histocompatibility Complex (dbMHC) An open, publicly accessible platform where the Human Leukocyte Antigen system (HLA) community can submit, edit, view, and exchange data related to the human Major Histocompatibility Complex.	Genetics; Major Histocompatibility Complex	FTP, Submission Systems	Database
Database of Single Nucleotide Polymorphisms (dbSNP) Includes single nucleotide polymorphisms, microsatellites, and small-scale insertions and deletions. Contains population-specific frequency and genotype data, as well as mapping information for both neutral polymorphisms and clinical mutations.	Genetics; Polymorphism, Single Nucleotide		Database
Developmental and Reproductive Toxicology Database (DART) References to the teratology, developmental, and reproductive toxicology literature.	Reproductive Medicine; Toxicology		Database
Dietary Supplement Label Database A free source of information, created via a collaboration of the NIH Office of Dietary Supplements with the National Library of Medicine, from the labels of dietary supplements marketed and sold in the United States.	Dietary Supplements	Downloadable Files (e.g. TXT, PDF)	Database, Images
Digital Collections Online archive of biomedical resources including books and films.	Catalogs, Library; History of Medicine	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database, Images, Reference	Multimedia
Digital Collections Web Service API Provides access to metadata and full-text OCR of all resources in the Digital Collections repository in XML format. Developers can use the Web service to incorporate NLM historical monographs, films and other resources into their own applications.	Catalogs, Library; History of Medicine	API, Encoded Data (e.g. HTML, XML, MARC)
Digital Differential Display A tool for comparing EST profiles in order to identify genes with significantly different expression levels.	Expressed Sequence Tags; Genetics	Utilities/Tools/EXE	Database
Directory of History of Medicine Collections Research, reference and interlibrary loan services.	Catalogs, Library; History of Medicine		Database, Reference
Disaster Information The Disaster Information Management Research Center provides health information resource and informatics research related to disasters of natural, accidental, or deliberate origin.	Disasters; Emergency Medicine; Environmental Health; Hazardous Substances	Downloadable Files (e.g. TXT, PDF), Mobile/Apps/Widgets	Multilanguage, Reference, Special Interest, Training	E-mail/Listserv/GovDelivery/RSS, Web 2.0/Social Media
Disaster Lit: Resource Guide for Disaster Medicine and Public Health Guide to freely available online disaster medicine and public health literature and related information.	Disasters; Emergency Medicine; Environmental Health; Public Health	Downloadable Files (e.g. TXT, PDF)	Database, Reference, Special Interest, Training	E-mail/Listserv/GovDelivery/RSS
DOCLINE Interlibrary loan (ILL) request, routing, and referral system.	Library Services	Downloadable Files (e.g. TXT, PDF)
Drug Information Information about U.S. drugs.	Pharmaceutical Preparations		Reference
Drug Information Portal Information for over 55,000 drugs. Names, usage, and structures are displayed, as well as search links to key NLM and government sites.	Pharmaceutical Preparations		Database
Drug Information Portal Mobile A mobile interface to information for over 55,000 drugs. Names, usage, and structures are displayed, as well as search links to key NLM and government sites, using their mobile version when available.	Pharmaceutical Preparations	Mobile/Apps/Widgets	Database
E-Bench Interactive tool that allows users to build E-utility URLs, view the raw output, and test in a simple environment before including in applications.	Software	Utilities/Tools/EXE
Ebot A tool that allows users to construct an E-utility analysis pipeline using an online form, and then generates a Perl script to execute the pipeline.	Software	Utilities/Tools/EXE
Electronic PCR (e-PCR) A computational procedure used to identify sequence tagged sites (STSs) within DNA sequences.	Expressed Sequence Tags; Genetics; Polymerase Chain Reaction	Utilities/Tools/EXE
Embryo Visually explore human embryo development with the Carnegie Embryo Collection mobile device.	Anatomy; Embryology	Mobile/Apps/Widgets
Entrez Search the biomedical databases of the Entrez Molecular Biology System.	Computational Biology		Database
Entrez Programming Utilities Tools that provide access to data within the NCBI Entrez system outside of the regular Web query interface. Entrez tasks are automated within applications and each specialized retrieval task can be used simply by writing a specially formatted URL.	Computational Biology; Software	API
Entrez Programming Utilities (E-Utilities) API E-Utilities are a set of server-side APIs that provide access to searching, linking and downloading Entrez System data outside of the regular Web query interfaces.	Computational Biology; Software	API
Environmental Health and Toxicology Information Portal to numerous NLM databases and resource in environmental health and toxicology.	Environmental Health; Toxicology		Database	E-mail/Listserv/GovDelivery/RSS
Environmental Health Student Portal Environmental Health education resources for middle school students and their teachers.	Environmental Health; Toxicology	Downloadable Files (e.g. TXT, PDF)	Educators/Students, Training
Epigenomics This resource provides a unique interface to search and navigate epigenomic data in the context of biological sample information, as well as tools to select, download and view multiple sets of epigenomic data as tracks on genome browsers.	Computational Biology		Database
FASTA BLAST Databases Sequence databases in FASTA format for use with the stand-alone BLAST programs. These databases must be formatted using formatdb before they can be used with BLAST.	Computational Biology	FTP
FDA Notices of Judgment Collection Archive of digitized court case summaries published between 1906-1965 for foods, drugs, cosmetics, and medical devices seized by the FDA under the 1906 Pure Food and Drug Act. Gateway to the 2,400+ box collection of prosecution’s evidence files.	Jurisprudence; Medicine	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database
Frequency-weighted Link (FLink) FLink is a tool that enables you to link from a group of records in a source database to a ranked list of associated records in a destination database based on frequency-weighted statistics.	Software	Utilities/Tools/EXE
GenBank Genetic sequence database.	Genetics	FTP	Database
GenBank: BankIt A Web-based sequence submission tool for one or a few submissions to the GenBank database, designed to make the submission process quick and easy.	Genetics	Submission Systems
GenBank: Barcode Tool for submission to the GenBank database of Barcode short nucleotide sequences from a standard genetic locus for use in species identification.	Genetics	Submission Systems
GenBank: Sequin A stand-alone software tool developed by the NCBI for submitting and updating entries to public sequence databases (GenBank, EMBL, or DDBJ). For simple submission, use the online submission tool BankIt instead.	Genetics	Submission Systems
GenBank: tbl2asn A command-line program that automates the creation of sequence records for submission to GenBank using many of the same functions as Sequin. It is used primarily for submission of complete genomes and large batches of sequences.	Genetics; Software	Submission Systems
Gene Database of gene-specific information. Each record represents a single gene from a given organism and can include, as available, nomenclature, map, sequence, expression, structure, functional, and homology data.	Genetics	FTP	Database
Gene Expression Omnibus (GEO) BLAST Tool for aligning a query sequence (nucleotide or protein) to GenBank sequences included on microarray or SAGE platforms in the GEO database.	Genomics	Utilities/Tools/EXE
Gene Expression Omnibus (GEO) Database A public functional genomics data repository supporting MIAME-compliant data submissions. Array- and sequence-based data are accepted and tools are provided to help users query and download experiments and curated gene expression profiles.	Genomics		Database
Gene Expression Omnibus (GEO) Datasets A component of the Gene Expression Omnibus (GEO) repository that contains submitter-supplied records (known as "GEO Series"), which summarize individual experiments, plus GEO DataSets that are assembled by GEO staff.	Genomics	FTP, Utilities/Tools/EXE	Database
Gene Expression Omnibus (GEO) Profiles Individual gene expression and molecular abundance profiles assembled from the Gene Expression Omnibus (GEO) repository. A Profile consists of the expression measurements for an individual gene across all Samples in a DataSet.	Genomics	FTP, Utilities/Tools/EXE	Database
Gene Expression Omnibus (GEO) Web Deposit Submit expression data, such as microarray, SAGE or mass spectrometry datasets to the NCBI Gene Expression Omnibus (GEO) database.	Genomics; Software	Submission Systems
Gene Plot A tool for pairwise comparison of two prokaryotic genomes that displays pairs of protein homologs that are symmetrical best hits between the two genomes.	Genomics; Proteomics	Utilities/Tools/EXE
GENE-TOX (Genetic Toxicology DataBank) Mutagenicity test data on chemicals based on peer review of the scientific literature.	Genetics; Toxicology		Database
GeneED Explore topics such as Cell Biology, DNA, Genes, Chromosomes, Heredity/Inheritance Patterns, Epigenetics/Inheritance and the Environment, Genetic Conditions, Evolution, Biostatistics, Biotechnology, DNA Forensics, and Top Issues in Genetics.	Education; Genetics	Downloadable Files (e.g. TXT, PDF)	Educators/Students, Training	E-mail/Listserv/GovDelivery/RSS, Multimedia, Web 2.0/Social Media
GeneRIF GeneRIF provides a simple mechanism to allow scientists to add to the functional annotation of genes in the Gene database.	Computational Biology; Genetics	Submission Systems
Genes and Disease Summary information for more than 80 genetic disorders with discussions of the underlying mutation(s) and clinical features, as well as links to related databases and organizations.	Genetics		Database
Genetic Codes Displays the genetic codes for organisms in the Taxonomy database in tables and on a taxonomic tree.	Genetics	Utilities/Tools/EXE	Database
Genetic Testing Registry (GTR) [NOTE: replaces GeneTests] A free, centralized voluntary registry of comprehensive genetic test information covering clinical and research tests for Mendelian disorders and drug responses including multigenic, array-based, biochemical, cytogenetic, and molecular tests.	Genetics	Downloadable Files (e.g. TXT, PDF), FTP, Submission Systems	Database	E-mail/Listserv/GovDelivery/RSS
Genetics Home Reference Genetic conditions and the genes or chromosomes responsible.	Genetics		Reference
Genetics Home Reference API Method for creating links or downloading Genetics Home Reference data in XML format. This service contains consumer information about genetic conditions, genes, and chromosome related to those conditions.	Genetics	API, Encoded Data (e.g. HTML, XML, MARC), Utilities/Tools/EXE	Reference
Genome Sequence and map data from the whole genomes of organisms. The genomes represent both completely sequenced organisms and those for which sequencing is in progress.	Genomics	FTP	Database
Genome Mapping Data Contains directories for each genome that include available mapping data for current and previous builds of that genome.	Genomics	FTP	Reference
Genome Project Searchable collection of complete and incomplete (in-progress) large-scale sequencing, assembly, annotation, and mapping projects for cellular organisms. The database provides an umbrella view of the status of each genome project.	Genomics	Submission Systems	Database	E-mail/Listserv/GovDelivery/RSS
Genome ProtMap Maps each protein from a COG or VOG back to its genome, and displays all the genomic segments coding for members of this particular group of related proteins.	Genomics; Proteomics	Utilities/Tools/EXE
Genome Reference Consortium (GRC) Maintains responsibility for the human and mouse reference genomes and works to correct misrepresented loci and to close remaining assembly gaps. Also seeks to provide alternate assemblies for complex or structurally variant genomic loci.	Genomics		Database
Genome Remapping Service NCBI Remap tool allows users to project annotation data from one assembly to another through a base by base analysis. Options are provided to adjust the stringency of remapping, and summary results are displayed on the page.	Genomics	Utilities/Tools/EXE
Genome UniSTS A comprehensive database of sequence tagged sites (STSs) derived from STS-based maps and other experiments. STSs are defined by PCR primer pairs and are associated with additional information, such as genomic position, genes, and sequences.	Expressed Sequence Tags; Genomics	FTP	Database
Genome Workbench An integrated application for viewing and analyzing sequence data. With Genome Workbench, you can view data in publically available sequence databases at NCBI, and mix these data with your own data.	Genomics	Utilities/Tools/EXE
Genomic Basic Local Alignment Search Tool (BLAST) This tool compares nucleotide or protein sequences to genomic sequence databases and calculates the statistical significance of matches.	Genomics; Proteomics	Utilities/Tools/EXE
GenPept The protein sequences corresponding to the translations of coding sequences (CDS) in GenBank are collected for each GenBank release..Please see the README file in the directory for more information.	Genomics; Proteomics	FTP
Haz-Map Links jobs and hazardous tasks with occupational diseases and their symptoms.	Hazardous Substances; Occupational Medicine; Toxicology	Mobile/Apps/Widgets	Database
Hazardous Substances Data Bank (HSDB) Comprehensive, peer-reviewed toxicology data for about 5,000 chemicals.	Hazardous Substances; Toxicology		Database
Health Data Standards and Privacy NLM participation in activities relating to nationwide implementation of an interoperable health information technology infrastructure to improve the quality and efficiency of health care.	Medical Records; Terminology as Topic	Downloadable Files (e.g. TXT, PDF)
Health Hotlines Toll-free telephone numbers for various health-related services. Also available as a database, ePub and pdf.	Health Services; Hotlines		Database, Multilanguage
Health Hotlines Mobile Mobile access to the directory of organizations with toll-free telephone numbers.	Health Services; Hotlines	Mobile/Apps/Widgets	Database, Multilanguage
Health Services and Sciences Research Resources (HSRR) Research datasets and instruments/indices.	Health Services Research		Database
Health Services Research & Health Care Technology Resources relating to access, cost, and quality issues in healthcare.	Health Services Research		Database, Training
Health Services Research Information Central A health services research information portal.	Health Services Research		Reference	Web 2.0/Social Media
Health Services Research Projects (HSRProj) Ongoing grants and contracts in health services research.	Health Services Research		Database
Health Services Technology Assessment Texts (HSTAT) Full-text documents providing health information and supporting health care decision making.	Health Services Research		Database
HealthReach Multilingual and multicultural health information for those working with or providing care to individuals with limited English proficiency.	Public Health; Refugees	Downloadable Files (e.g. TXT, PDF)	Database, Multilanguage, Special Interest	E-mail/Listserv/GovDelivery/RSS, Multimedia, Web 2.0/Social Media
Healthy People 2020 Structured Evidence Queries One-click PubMed search strategies related to Healthy People 2020 public health objectives.	Health Services Research; Public Health		Reference, Special Interest
History of Medicine Exhibitions, historical scholarship, and images in medicine.	History of Medicine		Educators/Students, Images, Reference	Multimedia
History of Medicine Finding Aids HMD Finding Aids is the central access point for electronic finding aids provided by the Archives and Modern Manuscripts and Prints and Photographs collections. XML is available via this list: http://oculus.nlm.nih.gov/f/findaid/harvest/list.html.	History of Medicine	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database, Images, Reference
HIV-1, Human Protein Interaction Database Information about known interactions of HIV-1 proteins with proteins from human hosts. It provides annotated bibliographies of published reports of protein interactions, with links to the corresponding PubMed records and sequence data.	Acquired Immunodeficiency Syndrome; Proteomics; Virology		Database
HomoloGene System for automated detection of homologs among the annotated genes of several completely sequenced eukaryotic genomes.	Genomics	FTP
Household Products Database Health and safety information on household products.	Household Products; Toxicology		Database
Images from the History of Medicine Images in the prints and photograph collection of the History of Medicine Division (HMD).	History of Medicine	Downloadable Files (e.g. TXT, PDF)	Database, Images	Multimedia
IndexCat User interface that provides access to the digitized version of the printed Index-Catalogue of the Library of the Surgeon General’s Office; eTK for medieval Latin texts; and eVK2 for medieval English texts. XML data are available for download.	Catalogs, Library; History of Medicine	Encoded Data (e.g. HTML, XML, MARC)	Database
Influenza Virus Resource Provides researchers with a growing collection of virus sequences essential to the identification of the genetic determinants of influenza pathogenicity.	Virology	FTP	Database
Integrated Risk Information System (IRIS) Hazard identification and dose-response assessments on chemicals.	Environmental Health; Hazardous Substances; Toxicology		Database
Interlibrary Loan Interlibrary loan services are available only to libraries.	Library Services		Reference
International Toxicity Estimates for Risk (ITER) Risk information on chemicals from several authoritative organizations worldwide.	Environmental Health; Hazardous Substances; Toxicology		Database
Journals in NCBI Databases Look up journals cited in NCBI databases, including PubMed.	Library Services	FTP	Database
LactMed (Drugs and Lactation Database) Find information about maternal and infant drug levels, possible effects on lactation and on breastfed infants, and alternative drugs to consider.	Obstetrics; Toxicology; Women's Health		Database, Special Interest
LactMed Mobile App for iPhone/iPod Touch/Android Devices Find information about maternal and infant drug levels, possible effects on lactation and on breastfed infants, and alternative drugs to consider. Mobile version	Obstetrics; Toxicology; Women's Health	Mobile/Apps/Widgets	Database, Special Interest
Learning Resources API The REST API provides identifiers to allow the user to search by title, subject, and description. This returns the information in JSON allowing Web pages to parse and display the information for end users.	Education	API	Database, Training
Learning Resources Database The Learning Resources Database collects educational materials created by NLM. These materials include videos, tutorials, webinars, and other resources that provide user education on NLM products and services.	Education		Database, Training
LinkOut Third parties can link directly from PubMed and other Entrez database records to relevant Web-accessible resources beyond the Entrez system. Includes full-text publications, biological databases, consumer health information and research tools.	Library Services	Utilities/Tools/EXE
List of Serials Indexed for Online Users Bibliographic information for serials indexed in MEDLINE (available in XML).	Library Services	Encoded Data (e.g. HTML, XML, MARC), FTP
LiverTox Provides up-to-date, accurate, and easily accessed information on the diagnosis, cause, frequency, patterns, and management of liver injury attributable to prescription and nonprescription medications, herbals and dietary supplements.	Gastroenterology; Toxicology		Database
Loansome Doc Enables PubMed and NLM Gateway users to order documents found in MEDLINE.	Library Services	Downloadable Files (e.g. TXT, PDF)
LocatorPlus Catalog of books, journals, and audiovisuals with holdings, availability, MARC 21, and more.	Library Services		Database
Malaria Research Resources Supports African scientists and malaria researchers.	Malaria		Special Interest
Map Viewer A software component of the Genome database that provides special browsing capabilities for a subset of organisms. View and search an organism's complete genome, display chromosome maps, and narrow down to the sequence data for a region of interest.	Genomics	Utilities/Tools/EXE
Martin Cummings and the NLM An online edition of XML-encoded speeches, articles, and Congressional Appropriations testimonies by former NLM director Martin M. Cummings, based on the collection of his papers in HMD’s Modern Manuscripts collection.	History of Medicine; Libraries	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database, Reference
MedGen A portal to information about medical genetics. MedGen includes term lists from multiple sources and organizes them into concept groupings and hierarchies.	Genetics	Downloadable Files (e.g. TXT, PDF), FTP	Database
Medical Subject Headings (MeSH) Controlled vocabulary thesaurus and MeSH Browser.	Medicine; Terminology as Topic	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database
Medical Text Indexer (MTI) A system for producing indexing recommendations to assist in the indexing process at NLM. Currently provides indexing recommendations to more than 100 journals based on the NLM Medical Subject Headings (MeSH) vocabulary.	Medical Informatics	Utilities/Tools/EXE
MEDLINE Leasing NLM leases MEDLINE/PubMed to U.S. individuals or organizations.	Library Services; MEDLINE	FTP	Reference
MEDLINE/PubMed References including abstracts to articles in thousands of biomedical journals.	MEDLINE; PubMed		Database
MEDLINE/PubMed Baseline Repository (MBR) Resources related to the annual baseline files. Includes a query tool for Web-based searching for use by NLM registered MEDLINE/PubMed licensees.	MEDLINE; PubMed	Downloadable Files (e.g. TXT, PDF)	Database
MedlinePlus Health information for patients, families and health care providers. Also in Spanish.	MEDLINE		Database, Multilanguage	Web 2.0/Social Media
MedlinePlus Connect A free service that allows electronic health record (EHR) systems to link to relevant and authoritative health information from MedlinePlus.	MEDLINE	Utilities/Tools/EXE
MedlinePlus Connect API Web application that responds to requests with an on-demand, formatted MedlinePlus Connect Web Service in which a patient portal or EHR selects which MedlinePlus links and information to provide from within the system.	MEDLINE	API
MedlinePlus en Español Health information for patients, families and health care providers in Spanish.	MEDLINE	Mobile/Apps/Widgets	Database, Multilanguage
MedlinePlus English Widgets and Buttons MedlinePlus makes trusted, reliable health information easily accessible in a variety of formats, including widgets and buttons. This resource allows the user to embed widgets and buttons on a Web site.	MEDLINE	Mobile/Apps/Widgets
MedlinePlus Health Topic XML Files The MedlinePlus Health Topic XML files contain records for all English and Spanish health topics. Each health topic record includes data elements associated with that topic and are available for download.	MEDLINE	Encoded Data (e.g. HTML, XML, MARC)	Multilanguage
MedlinePlus Health Topics API Provides access to health topic data in XML format. The service accepts keyword searches as requests and returns links to relevant English-language health topics in ranked order.	MEDLINE	API
MedlinePlus Mobile Authoritative consumer health information from MedlinePlus.gov in a mobile-optimized Web site	MEDLINE	Mobile/Apps/Widgets	Database
MedlinePlus Spanish Widgets and Buttons MedlinePlus makes trusted, reliable health information easily accessible in a variety of formats, including widgets and buttons. This resource allows the user to embed widgets and buttons on a Web site in Spanish.	MEDLINE	Mobile/Apps/Widgets	Multilanguage
MedPix MedPix is a database of patient cases integrating images and textual information. The content material is organized by disease location (organ system), pathology category, patient profiles, and by image classification and caption.	Education; Medicine	Datasets/XLS/CSV	Database, Images, Reference, Training	E-mail/Listserv/GovDelivery/RSS
MeSH Browser Medical Subject Heading search tool.	Medicine; Terminology as Topic		Database, Reference
MeSH Database NLM controlled vocabulary used for indexing articles for MEDLINE/PubMed. MeSH terminology provides a consistent way to retrieve information that may use different wording for the same concepts.	Medicine; Terminology as Topic		Database, Reference
MeSH on Demand MeSH on Demand identifies MeSH Terms in your text using the NLM Medical Text Indexer (MTI) program. After processing, MeSH on Demand returns a list of MeSH Terms relevant to your text.	Medical Informatics	Utilities/Tools/EXE
MeSH RDF Beta Medical Subject Headings(MeSH) linked data. Includes a SPARQL endpoint, RESTful interface and bulk download of MeSH RDF data.	Medicine; Terminology as Topic	API, Datasets/XLS/CSV, Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC), FTP	Database, Reference
MetaMap Highly configurable program to map biomedical text to the UMLS Metathesaurus or, equivalently, to discover Metathesaurus concepts referred to in text.	Medicine; Terminology as Topic	Datasets/XLS/CSV
MetaMap API The MetaMap Java API and the MetaMap UIMA Annotator allow users to access MetaMap directly through their Java-based application(s).	Medicine; Terminology as Topic	API
Mobile Resources NLM projects involving Web sites and resources designed for mobile devices.	Medicine	Mobile/Apps/Widgets
Molecular Biology Molecular biology, computational biology and related software tools.	Molecular Biology	FTP		E-mail/Listserv/GovDelivery/RSS
National Drug File - Reference Terminology API Provides clinical information about medications, including therapeutic intent, mechanism of action, physiologic effect and drug-drug interactions. Two NDF-RT APIs (SOAP/WSDL and RESTful) are available for retrieving NDF-RT data.	Pharmacy	API
NCBI C++ Toolkit Manual A comprehensive manual on the NCBI C++ toolkit, including its design and development framework, a C++ library reference, software examples and demos, FAQs and release notes. It is searchable online and can be downloaded as a series of PDF documents.	Computational Biology; Software		Database
NCBI Data Specifications Specifications for NCBI data in ASN.1 or DTD format. The “NCBI_data_conversion.html” links to the conversion tool.	Computational Biology; Software	FTP
NCBI Education Page Links to tutorials and training materials, including PowerPoint slides and print handouts.	Computational Biology; Education		Database, Training
NCBI Field Guide Manual Downloadable material for previously offered NCBI Field Guide training course.	Computational Biology	FTP	Training
NCBI Glossary Part of the NCBI Handbook, this glossary contains descriptions of NCBI tools and acronyms, bioinformatics terms and data representation formats.	Computational Biology; Terminology as Topic		Database, Reference
NCBI Handbook An extensive collection of articles about NCBI databases and software.	Computational Biology		Database, Reference
NCBI Help Manual Accessed through the NCBI Bookshelf, the Help Manual contains documentation for many NCBI resources, including PubMed, PubMed Central, the Entrez system, Gene, SNP and LinkOut. All chapters can be downloaded in PDF format.	Computational Biology		Database, Reference
NCBI News Monthly newsletter provides information on new and updated databases, and software services. Articles highlight and demonstrate services, features, tools, and interesting data with practical examples of their use.	Computational Biology	Utilities/Tools/EXE
NCBI Structure Course Materials PowerPoint slides, handouts and exercises for the previously offered NCBI course "Exploring 3D Molecular Structures".	Computational Biology	FTP	Training
NCBI Toolbox A set of software and data exchange specifications used by NCBI to produce portable, modular software for molecular biology. Primarily designed to read records in Abstract Syntax Notation 1 (ASN.1) format, an International Standards Organization (ISO) data representation format.	Computational Biology	Utilities/Tools/EXE
NCBI Website Search A database of static NCBI Web pages, documentation, and online tools. Includes specialized online sequence analysis tools, back issues of newsletters, legacy resource description pages, sample code, and other miscellaneous resources.	Computational Biology		Database
NIH Common Data Elements (CDE) Repository The NIH Common Data Elements (CDE) Repository has been designed to provide access to structured human and machine-readable definitions of data elements that have been recommended or required by NIH Institutes and Centers and other organizations for use in research and for other purposes.	Common Data Elements; Medical Informatics; Technology	API	Database
NIH Manuscript Submission System (NIHMS) The NIH Public Access Policy requests that researchers funded by NIH submit their final, peer-reviewed manuscripts, which have been accepted for publication, to PubMed Central.	Library Services	Submission Systems
NIH Public Access The NIH Public Access Policy ensures that the public has access to the published results of NIH-funded research. The NIH Manuscript Submission System is a mechanism for authors to deposit their NIH-funded manuscripts.	Library Services		Database, Reference
NIHSeniorHealth Easily-accessible age-related health information.	Geriatrics	Utilities/Tools/EXE
NLM Catalog An alternate way to search books, journals, audiovisuals, electronic, and other materials with links to LocatorPlus holdings and availability.	Catalogs, Library		Database	E-mail/Listserv/GovDelivery/RSS
NLM Classification Medical library classification and index tool for the arrangement of library materials.	Libraries; Terminology as Topic	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database, Training
NLM DTDs A Suite of tag sets for authoring and archiving journal articles. Provides a set of XML schema modules that define elements and attributes for describing the textual and graphical content of journal articles as well as some non-article materials.	Libraries; Software	FTP
NLM Gateway Search multiple retrieval systems.	Library Services		Database
NLM Native Voices Mobile App for iPad This is the official app for the popular Native Voices: Native Concepts of Health and Illness exhibition at the National Library of Medicine.	Ethnic Groups; Libraries; Public Health	Mobile/Apps/Widgets	Special Interest	Multimedia
NLM Technical Bulletin Web-based newsletter for NLM online searchers.	Libraries	Downloadable Files (e.g. TXT, PDF)		E-mail/Listserv/GovDelivery/RSS
Nucleotide Contains nucleotide sequence data from organisms. Includes data from a number of sources databases such as GenBank, RefSeq, TPA, and PDB.	Biochemistry; Nucleotides	FTP, Utilities/Tools/EXE	Database
Nursing Resources for Standards and Interoperability A nursing terminologies resource for systems development. Describes the role of SNOMED CT and Laboratory Observation Identifiers Names and Codes (LOINC) in implementing Meaningful Use in the U.S., specifically for the nursing and care domain.	Nursing		Reference, Special Interest
OLDMEDLINE Data References to biomedical journal articles 1947 through 1965.	MEDLINE		Database, Reference
OMIM (Online Mendelian Inheritance in Man) Comprehensive, authoritative, and timely compendium of human genes and genetic phenotypes.	Genetics	FTP	Database
Online Exhibitions and Digital Projects Enhancing the public and scholarly awareness and appreciation of National Library of Medicine collections.	Libraries; Medicine		Database	Multimedia
Online Oral Histories History of Medicine Division's XML-encoded online oral histories provide access to a wealth of digitized transcripts, and audio when available.	History of Medicine	Downloadable Files (e.g. TXT, PDF)	Database, Reference	Multimedia
Open Reading Frame Finder (ORF Finder) A graphical analysis tool that finds all open reading frames in a user's sequence or in a sequence already in the database.	Genetics	Utilities/Tools/EXE
Open-i Open-i service provides search and retrieval of abstracts and images (including charts, graphs, clinical images, etc.) from the open source literature, and biomedical image collections. Searching may be done by text queries as well as by query images.	Education; Medical Informatics; PubMed	API, Datasets/XLS/CSV, Encoded Data (e.g. HTML, XML, MARC)	Database, Images, Reference, Training	E-mail/Listserv/GovDelivery/RSS
OSIRIS A public domain quality assurance software package that facilitates the assessment of multiplex short tandem repeat (STR) DNA profiles based on laboratory-specific protocols.	Genetics	Utilities/Tools/EXE
Outreach Resources and Activites Population specific Web-based resources.	Ethnic Groups; Public Health		Educators/Students, Special Interest	E-mail/Listserv/GovDelivery/RSS, Web 2.0/Social Media
Pathways for Public Health Information Guides to Web resources on environmental health and toxicology, disasters, chemicals, drugs, and special populations.	Disasters; Environmental Health; Ethnic Groups; Public Health		Reference, Special Interest
Physician’s Lives in the Shenandoah Valley XML-encoded transcriptions and images of 828 handwritten letters (1786-1907) from the History of Medicine's Henkel Family correspondence collection; comprised largely of letters to and from Caspar C. Henkel (1835-1908).	History of Medicine	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Database, Images, Reference
Pillbox Pillbox enables rapid identification of unknown solid-dosage medications (tablets/capsules) based on physical characteristics and high-resolution images.	Pharmaceutical Preparations	Datasets/XLS/CSV, Encoded Data (e.g. HTML, XML, MARC), Mobile/Apps/Widgets	Database, Images	E-mail/Listserv/GovDelivery/RSS, Web 2.0/Social Media
Pillbox beta API Provides access to the pharmaceutical identification and reference system, data, and medication images.	Pharmaceutical Preparations	API
PMC Open Access Web Service The service allows users to discover downloadable resources from the PMC Open Access Subset by providing an API to allow discovery of resources related to articles.	Library Services; PubMed	API
PMC Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) Service Provides access to metadata of all items in the PMC archive, and the full text of a subset of these items. PMC-OAI is an implementation of the Open Archives Initiative Protocol for Metadata Harvesting.	Library Services; PubMed	API
PopSet Sets of DNA sequences that have been collected to analyze the evolutionary relatedness of a population.	Genetics	FTP, Utilities/Tools/EXE	Database
Practice Guidelines Full-text documents providing health information and supporting health care decision making.	Health Services Research		Database
Primer-BLAST The Primer-BLAST tool uses Primer3 to design PCR primers to a sequence template. The potential products are then automatically analyzed with a BLAST search against user specified databases, to check the specificity to the target intended.	Computational Biology	Utilities/Tools/EXE
Probe A public registry of nucleic acid reagents designed for use in a wide variety of biomedical research applications, together with information on reagent distributors, probe effectiveness, and computed sequence similarities.	Chemistry; Molecular Probes	FTP	Database
Profiles in Science Archival collections of leaders in biomedical research and public health.	History of Medicine; Public Health; Science		Special Interest
Profiles in Science API Archival collections of leaders in biomedical research and public health. Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) Service provides access to the Dublin Core metadata of items in archival collections.	History of Medicine; Public Health; Science	API	Special Interest
ProSplign A utility for computing alignment of proteins to genomic nucleotide sequence based on a variation of the Needleman Wunsch global alignment algorithm and specifically accounts for introns and splice signals.	Proteomics; Software	Utilities/Tools/EXE
Protein Contains protein sequences from organisms. Includes data from a number of source databases such as GenPept (translations from annotated coding regions in GenBank), RefSeq, SwissProt, PIR, PRF, and PDB.	Proteomics	FTP, Utilities/Tools/EXE	Database
Protein Clusters A collection of Reference Sequence (RefSeq) proteins, from the complete genomes of prokaryotes, plasmids, and organelles, that have been grouped and annotated based on sequence similarity and protein function.	Proteomics	FTP, Utilities/Tools/EXE	Database
PSSM Viewer Users can display, sort, subset and download position-specific score matrices (PSSMs) either from CDD records or from Position Specific Iterated (PSI)-BLAST protein searches.	Computational Biology; Proteomics	Utilities/Tools/EXE
PubChem PubChem is organized as three linked databases (PubChem Substance, PubChem Compound, PubChem BioAssay) within the Entrez system. Links from PubChem's chemical structure records to other Entrez databases provide information on biological properties.	Chemistry	FTP		E-mail/Listserv/GovDelivery/RSS, Multimedia
PubChem BioAssay Contains bioactivity screens of chemical substances described in PubChem Substance. It provides searchable descriptions of each bioassay, including descriptions of the conditions and readouts specific to that screening procedure.	Biochemistry; Biological Assay		Database
PubChem Compound Derived from PubChem Substance this NCBI database provides a non-redundant view of the chemically validated substances in PubChem Substance. There is one PubChem Compound record for each unique substance, and for each unique substance component.	Chemistry		Database
PubChem Deposition Gateway Use this site to contribute new data to PubChem and/or test data upload procedures. Create a test account to test the deposition procedures and to preview data records then move on to a deposition account to upload data to the public database.	Chemistry	Submission Systems
PubChem Download Service This service allows users to download compound or substance records corresponding to a set of PubChem identifiers, which can be supplied manually or through a text file. Numerous download formats are available, including SDF, XML and SMILES.	Chemistry; Library Services	Downloadable Files (e.g. TXT, PDF), Encoded Data (e.g. HTML, XML, MARC)	Images	Multimedia
PubChem Power User Gateway (PUG) The PubChem Power User Gateway (PUG) provides access to PubChem services via a programmatic interface for retrieving information on the biological activities of small molecules. PUG provides access to these PubChem services: Data Download (substance and compound), Compound Structure Search, BioAssay Data Download and Structure Standardization.	Chemistry; Library Services	API
PubChem Standardization Service Standardization, in PubChem terminology, is the processing of chemical structures in the same way used to create PubChem Compound records from contributors' original structures. Users can see how PubChem handles structures they would like to submit.	Chemistry; Library Services	Encoded Data (e.g. HTML, XML, MARC), Utilities/Tools/EXE
PubChem Structure Search PubChem Structure Search allows the PubChem Compound Database to be queried by chemical structure or chemical structure pattern. The PubChem Sketcher allows a query to be drawn manually.	Chemistry	Utilities/Tools/EXE
PubChem Substance Chemical substance information electronically submitted to PubChem by depositors. This includes any chemical structure information submitted, as well as chemical names, comments, and links to the depositor's Web site.	Chemistry		Database
Public Health Partners Information access for the public health workforce.	Public Health			E-mail/Listserv/GovDelivery/RSS
PubMed PubMed comprises more than 20 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher Web sites.	PubMed		Database
PubMed Central (PMC) Free digital archive of full text biomedical and life sciences journal literature.	PubMed	Downloadable Files (e.g. TXT, PDF), FTP	Database	E-mail/Listserv/GovDelivery/RSS
PubMed Central Open-Access Subset This small subset of articles in PMC are made available under a Creative Commons or similar license that generally allows more liberal redistribution and reuse than a traditional copyright. Refer to the license statement in each article for details.	PubMed	FTP
PubMed Clinical Queries A specialized PubMed search form targeted to clinicians and health services researchers. The page simplifies searching by clinical study category, finding systematic reviews and searching the medical genetics literature.	Public Health; PubMed	Utilities/Tools/EXE	Reference
PubMed for Handhelds Search MEDLINE with the Web browser of any mobile device.	PubMed	Mobile/Apps/Widgets
PubMed Health A service that specializes in reviews of clinical effectiveness research (CER), with easy-to-read summaries for consumers as well as full technical reports. CER finds answers to the question “What works?” in medical and health care.	Public Health; PubMed		Database
PubMed Mobile A simplified mobile friendly Web interface to access PubMed which includes over 20 million citations for biomedical literature from MEDLINE, life science journals, and online books.	PubMed	Mobile/Apps/Widgets	Database
PubMed Special Queries Directory of topic-specific PubMed queries including AIDS, Bioethics, Cancer, Space Life Sciences as well as Clinical Queries along with many other search strategies.	Public Health; PubMed		Database, Reference
PubMed Tutorial Interactive instruction tool.	PubMed		Training
Radiation Emergency Medical Management (REMM) Designed for health care providers, primarily physicians, without formal expertise in radiation safety or radiation medicine who may provide medical care during an accidental or non-accidental radiation event.	Disasters; Emergency Medicine; Environmental Health; Hazardous Substances	Downloadable Files (e.g. TXT, PDF)	Database, Reference, Special Interest, Training	E-mail/Listserv/GovDelivery/RSS
Radiation Emergency Medical Management (REMM) Mobile Guidance for health care providers on the diagnosis and treatment of radiation injuries during radiation and nuclear emergencies via a mobile app.	Disasters; Emergency Medicine; Environmental Health; Hazardous Substances	Mobile/Apps/Widgets	Database, Reference, Special Interest, Training	E-mail/Listserv/GovDelivery/RSS
Reference Sequence (RefSeq) A collection of curated, non-redundant genomic DNA, transcript (RNA), and protein sequences produced by NCBI. Provides a stable reference for genome annotation, gene identification and characterization, and comparative analysis.	Computational Biology; Genetics	FTP	Database
RefSeqGene RefSeqGene, a subset of NCBI's Reference Sequence (RefSeq) project, defines genomic sequences to be used as reference standards for well-characterized genes. These sequences, are labeled with the keyword RefSeqGene in NCBI's nucleotide database.	Computational Biology; Genetics		Database
Related Structures The Related Structures tool allows users to find 3D structures from the Molecular Modeling Database (MMDB) that are similar in sequence to a query protein.	Proteomics	Utilities/Tools/EXE
Research Reporting Guidelines and Initiatives: By Organization A chart of the major biomedical research reporting guidelines that provide advice for reporting research methods and findings.	Library Services		Reference
Retrovirus Resources A collection of resources designed to support the research of retroviruses, including a genotyping tool, alignment tool for global alignment of multiple sequences, a HIV-1 automatic sequence annotation tool, and annotated maps of many retroviruses.	Virology		Database
ReUnite A post-disaster family reunification technology. In addition to basic missing person data, it allows image capture, metadata tagging, geo-location, text and voice notes, and support for French and Spanish languages. Available from Apple iTunes.	Disasters	Mobile/Apps/Widgets	Multilanguage
RxMix An interface for building applications that allows users to combine functions of the RxNorm, RxTerms, and NDF-RT APIs.	Pharmaceutical Preparations; Software	API
RxNorm A standardized nomenclature for clinical drugs.	Pharmaceutical Preparations; Terminology as Topic	Datasets/XLS/CSV
RxNorm API Provide developers with functions for retrieving RxNorm data from the most current RxNorm data set.	Pharmaceutical Preparations; Terminology as Topic	API
RxTerms API RxTerms is a drug interface terminology derived from RxNorm for prescription writing or medication history recording. There are two RxTerms APIs (SOAP/WSDL and RESTful) available to provide developers with functions for retrieving RxTerms data.	Pharmaceutical Preparations; Terminology as Topic	API
SARS CoV A summary of data for the SARS coronavirus (CoV), including: links to the most recent sequence data and publications, links to other SARS related resources, and a pre-computed alignment of genome sequences from various isolates.	Virology		Database
Semantic Knowledge Representation (SKR) API Provides access to the entire suite of SKR tools including MetaMap, Medical Text Indexer (MTI), and SemRep, and allows programmatic access to the SKR Batch and Interactive facilities.	Computational Biology; Terminology as Topic	API
Single Nucleotide Polymorphism (dbSNP) Database of single nucleotide polymorphisms (dbSNP), small-scale insertions/deletions, polymorphic repetitive elements, and microsatellite variation.	Genetics; Polymorphism, Single Nucleotide	Datasets/XLS/CSV, FTP, Utilities/Tools/EXE
SKY/M-Fish and CGH Data SKY-CGH data in ASN.1, XML and EasySKYCGH formats.	Software	Encoded Data (e.g. HTML, XML, MARC), FTP	Database
SNP Database Specialized Search Tools Search by genotype, method, population, submitter, markers and sequence similarity.	Genetics; Polymorphism, Single Nucleotide	Utilities/Tools/EXE
Social Media Follow, Fan and Connect with NLM.	Social Media			E-mail/Listserv/GovDelivery/RSS, Web 2.0/Social Media
Splign Compute cDNA-to-Genomic sequence alignments.	Computational Biology; Genetics	Utilities/Tools/EXE
Structure (Molecular Modeling Database) General information about the National Center for Biotechnology Information (NCBI) Structure Group and its research projects, as well as access to the Molecular Modeling Database (MMDB) and related tools.	Molecular Biology	FTP	Database
Structured Abstracts Information about abstracts with distinct, labeled sections (e.g., Introduction, Methods, Results, discussion) that appear in MEDLINE.	Library Services; MEDLINE	Datasets/XLS/CSV, Downloadable Files (e.g. TXT, PDF)
Taxonomy Contains the names and lineages of organisms, both living and extinct, that are represented in the genetic databases with at least one nucleotide or protein sequence. New organisms are added to the database as sequence data are deposited for them.	Biology; Classification	FTP
Taxonomy Browser Search the taxonomy tree using partial taxonomic names, common names, wild cards and phonetically similar names.	Biology; Classification	Utilities/Tools/EXE
Taxonomy Common Tree Generates a taxonomic tree for a selected group of organisms. Users can upload a file of taxonomy IDs or names, or they can enter names or IDs directly.	Biology; Classification	Utilities/Tools/EXE
Taxonomy Statistics Displays the number of taxonomic nodes in the database for a given rank and date of inclusion.	Biology; Classification	Utilities/Tools/EXE
Taxonomy Status Reports Displays the current status of a set of taxonomic nodes or IDs.	Biology; Classification	Utilities/Tools/EXE
TaxPlot A tool for comparing genomes on the basis of the protein sequences they encode.	Genomics	Utilities/Tools/EXE
Third Party Annotation (TPA) Database A database that contains sequences built from the existing primary sequence data in GenBank. The sequences and corresponding annotations are experimentally supported and have been published in a peer-reviewed scientific journal.	Computational Biology; Genetics		Database
Tox Town Interactive guide to toxic chemicals and environmental health risks. Also in Spanish (ToxTown en español).	Environmental Health; Toxicology	Downloadable Files (e.g. TXT, PDF)	Educators/Students, Multilanguage, Training
Toxicology Literature Online (TOXLINE) Over 3 million references to the toxicological literature.	Environmental Health; Toxicology		Database
Toxicology Tutorials College-level tutorials on the basic principles of toxicology, toxicokinetics, and cellular toxicology.	Toxicology		Educators/Students, Training
Toxics Release Inventory (TRI) Annual estimated releases of toxic chemicals into the environment by industrial facilities in the United States.	Environmental Health; Toxicology		Database
TOXMAP Uses maps of the United States to show the amount and location of toxic chemicals released into the environment.	Environmental Health; Toxicology		Database, Educators/Students, Training	E-mail/Listserv/GovDelivery/RSS
ToxMystery Interactive learning site on toxic substances for children 7-10 years old.	Environmental Health; Toxicology		Educators/Students, Multilanguage, Training
TOXNET (Toxicology Data Network ) A cluster of databases covering toxicology, hazardous chemicals, environmental health and related areas.	Environmental Health; Toxicology		Database
TOXNET API TOXNET API offers a RESTful Web Service API that allows users to search TOXNET databases with keywords.	Environmental Health; Toxicology	API	Database
TOXNET Mobile Easy to use, mobile-optimized Web interface to the TOXNET databases, covering toxicology, hazardous chemicals, environmental health and related areas.	Environmental Health; Toxicology	Mobile/Apps/Widgets	Database
Turning the Pages Digitized images of rare and beautiful historic books in the biomedical sciences.	History of Medicine		Images, Multilanguage
Turning the Pages Mobile Explore beautiful historical medical texts with this app for your iPad. Manuscripts come from a variety of regions and eras, from the Islamic medieval world to 19th century Japan to Renaissance Europe.	History of Medicine	Mobile/Apps/Widgets	Images, Multilanguage
Unified Medical Language System (UMLS) Database of biomedical vocabularies (including SNOMED CT), and related semantic and lexical resource for system developers.	Medicine; Terminology as Topic	Datasets/XLS/CSV	Database	E-mail/Listserv/GovDelivery/RSS
Unified Medical Language System (UMLS) Terminology Services API Intended for application developers to perform Web service calls and retrieve UMLS data within their own applications. Documentation provides a suite of Web Services Description Language (WSDL) files, API installation instructions, and sample code.	Medicine; Terminology as Topic	API
UniGene An automated analytical system for producing organized views of the transcriptome from a growing number of organisms.	Computational Biology; Genetics	FTP
UniSTS A unified, non-redundant view of sequence tagged sites (STSs). UniSTS integrates marker and mapping data from a variety of public resource.	Expressed Sequence Tags; Genetics	FTP
UniVec UniVec and UniVec_Core databases in FASTA format.	Computational Biology	FTP
Value Set Authority Center (VSAC) VSAC provides access to value sets contained in the 2014 Clinical Quality Measures (CQMs). VSAC will expand to incorporate value sets for other use cases, such as public health and clinical effectiveness research.	Medicine; Terminology as Topic	API, Datasets/XLS/CSV, Encoded Data (e.g. HTML, XML, MARC)
VecScreen Quickly identifying segments of a nucleic acid sequence that may be of vector origin.	Genetics	Utilities/Tools/EXE
Vector Alignment Search Tool (VAST) A computer algorithm that identifies similar protein 3-dimensional structures. Structure neighbors for every structure in MMDB are pre-computed and accessible via links on the MMDB Structure Summary pages.	Proteomics	Utilities/Tools/EXE
Viral Genomes Curated sequence data and related information for the community.	Genomics; Virology		Database
Viral Genotyping Tool This tool helps identify the genotype of a viral sequence.	Genetics; Virology	Utilities/Tools/EXE
Virus Variation Extension of the Influenza Virus Resource to other organisms, providing an interface to download sequence sets of selected viruses; analysis tools, including virus-specific BLAST pages; and genome annotation pipelines (in progress).	Genetics; Virology		Database
Visible Human Project Three-dimensional representations of the human male and female bodies.	Anatomy	Datasets/XLS/CSV, Downloadable Files (e.g. TXT, PDF)	Database, Images
Voyager Client/server protocol for fielded search and retrieval of MARC bibliographic records from the NLM integrated library system (ILS). Retrieve in MARC-8 or UTF-8 character encodings.	Library Services	API
Water Emergency Response for Libraries Steps on what you should do after a water emergency in your library or cultural heritage institution.	Disasters; Libraries	Mobile/Apps/Widgets	Reference
Whole Genome Shotgun Sequences Whole genome shotgun sequence data organized by the 4-digit project code. Data include GenBank and GenPept flat files, quality scores and summary statistics.	Computational Biology; Genomics	FTP
Wireless Information System for Emergency Responders (WISER) Assists first responders in hazardous material incidents.	Disasters; Emergency Medicine; Environmental Health; Hazardous Substances	Downloadable Files (e.g. TXT, PDF), Mobile/Apps/Widgets, Utilities/Tools/EXE	Database, Reference, Special Interest, Training	E-mail/Listserv/GovDelivery/RSS