The Systematized Nomenclature of Medicine (SNOMED) is the most widely recognised nomenclature in healthcare.[26] Its current version, SNOMED Clinical Terms (SNOMED CT), is intended to provide a set of concepts and relationships that offers a common reference point for comparison and aggregation of data about the health care process.[27] SNOMED CT is often described as a reference terminology.[28] SNOMED CT contains more than 311,000 active concepts with unique meanings and formal logic-based definitions organised into hierarchies.[27] SNOMED CT can be used by anyone with an Affiliate License, 40 low income countries defined by the World Bank or qualifying research, humanitarian and charitable projects.[27] SNOMED-CT is designed to be managed by computer, and it is a complex relationship concepts.[26]