- Web Link Bureau International des Poids et Mesures
- Web Link Asia Pacific Laboratory Accreditation Cooperation
- Web Link European co-operation for Accreditation
- Web Link The European Association of National Metrology Institutes
- Web Link Eurache
- Web Link European Federation of National Associations of Measurement
- Web Link International Electrotechnical Commission
- Web Link International Laboratory Accreditation Cooperation
- Web Link International Measurement Confederation
- Web Link International Organisation for Standardization
- Web Link NCSL International, USA
- Web Link National Institute of Standards and Technology
- Web Link National Physical Laboratory
- Web Link International Organisation of Legal Metrology
- Web Link Physikalisch-Technische Bundesanstalt, Braunschweig und Berlin
- Web Link European Cooperation in Legal Metrology