UMLS

Logical Observation Identifier Names and Codes. (LOINC)
Medical Subject Headings. National Library of Medicine. (MeSH)
National Drug File Reference Terminology. (NDFRT)
Computer Retrieval of Information on Scientific Projects. (CSP)
Alcohol and Other Drug Thesaurus. (AOD)
Library of Congress Subject Headings. (LCH)
National Cancer Institute. (NCI)
NLM. RxNorm Project. (RXNORM)
US Pharmacopeia (USP). Medicare Prescription. (USPMG)
National Cancer Institute (PDQ)
Veterans Health Administration National Drug File. (VANDF)
Health Topics,NLM.(MEDLINEPLUS)
Coding Symbols for Thesaurus of Adverse Reaction Terms. (CST)
Computer-Stored Ambulatory Records (COSTAR).
University of Washington Digital Anatomist (UWDA)
Health Level Seven Vocabulary (HL7V2.5)
Health Level Seven Vocabulary (HL7V3.0)
Online Mendelian Inheritance in Man. (OMIM)
DXplain.Massachusetts General Hospital. (DXP)
Quick Medical Reference. (QMR)
QMR clinically related terms from Randolf A. Miller (RAM)
International Classification of Diseases, 9th. (ICD9CM)
National Center for Biotechnology Information (NCBI)
Clinical Classifications Software. (CCS)
Standard Product Nomenclature (SPN)
AI/RHEUM. National Library of Medicine, Lister Hill Center. (AIR)
Perioperative Nursing Data Set. (PNDS)
Authorized Osteopathic Thesaurus. (AOT)
Methodologic Terms for Clinical Epidemiologic Studies of Human Disorders.
Canada: McMaster University. (MCM)

Healthcare Common Procedure Coding System. (HCPCS)
UMLS Metathesaurus Source Terminologies. (SRC)
Gene Ontology. (GO)
Gene Nomenclature. (HUGO)
International Classification of Primary Care. (ICPC)
UMLS Metathesaurus (MTH )