COMAR: International database for certified reference materials
ERM: European Reference Materials
IRMM: Institute for Reference Materials and Measurements
NIST: National Institute of Standards and Technology.
LGC: LGC Standards
HPA: Health Protection Agency
GeoReM: The GeoReM database of geological reference materials
IAEA: The IAEA database of natural matrix reference materials
JCTLM: JCTLM database: Laboratory medicine and in vitro diagnostics
KCDB: Key comparisons database (KCDB) at the Bureau International des Poids et Mesures (BIPM)
RMinfo: Reference materials total information service of Japan (RMinfo)
RMISYS: CRM total info web of Korea
VIRM: Virtual Institute for Reference Materials
