American Society for Quality - (ASQ)
American Association for Laboratory Accreditation - (A2LA)
Bureau International des Poids et Mesures - (BIPM)
International Laboratory Accreditation Cooperation - (ILAC)
International Organization of Legal Metrology - (OIML)
International Society for Measurement and Control - (ISA)
Laboratory Accreditation Bureau - (LAB)
National Association for Proficiency Testing - (NAPT)
National Cooperation for Laboratory Accreditation - (NACLA)
National Research Laboratory of Metrology (NRLM) Homepage - Japan
National Voluntary Laboratory Accreditation Program NVLAP (NIST)
NCSL International - (NCSLI)
North American Cooperation in Metrology - (NORAMET)
NRC - Institute for National Measurement Standards (INMS) - Canada
SP - Swedish National Testing and Research Institute - Sweden
The American National Standards Institute - (ANSI),
The International Organization for Standardization - (ISO)
The National Physical Laboratory (NPL) - Great Britain