BIPM - Bureau International des Poids et Mesures (BIPM) PTB - Physikalish-Technische Bundesanstalt IAAC - Inter American Accreditation Cooperation COPANT - Pan American Standards Commission ANSI - American National Standards Institute ASQC - American Society of Quality Control IEC - International Electrotechnical Commission ISO - International Organization for Standardization ILAC - International Laboratory Accreditation Cooperation NCCLS - National Committee for Clinical Laboratory Standards
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