(AU)National Standards Commission - Coordinates the national measurement system to provide confidence in the validity of measurements used in industry, commerce, and the community.
Bureau International des Poids et Mesures (BIPM) - Ensures world-wide uniformity of measurements and their traceability to the SI, and carries out measurement-related research (in French and English).
U.S. Metric Association (USMA) - National nonprofit organisation, founded in 1916, which advocates U.S. conversion to the International System of Units (SI), also called the modern metric system.