| Provider Name | Provider Code | URI |
|---|---|---|
| An Ontology for Units of Measure | un |
http://www.w3.org/2007/ont/unit#C |
| An Ontology for Units of Measure (RDF) | rdf |
http://www.w3.org/2007/ont/unit#C |
| Bioregistry | bioregistry |
https://bioregistry.io/un:C |