| Asia- Pacific Legal Metrology Forum | www.aplmf.org |
| Bureau International des Poids et Mesures | www.bipm.fr |
| EURAMET | www.euramet.org |
| European Commission | http://europa.eu.int |
| European Committee for Standardisation | www.cenorm.be |
| European Committee Electrotechnical Standardisation | www.cenelec.be |
| European Cooperation for Accreditation | www.european-accreditation.org |
| International Organisation for Standardisation | www.iso.ch |
| International Electrotechnical Commission | www.iec.ch |
| International Laboratory Accreditation Cooperation | www.ilac.org |
| Organisation International de Métrologie Legale | www.oiml.org |
| National Metrology Institute of South Africa | www.nmisa.org |
| Sistema Interamericano de Metrologica | www.sim-metrologia.org.br |