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G

General conference on measures and weights

See CGPM.

GLP

Good Laboratory Practice. Accrediting bodies approve laboratories in accordance with the GLP rules of OECD.

GUM

Guide to the Expression of Uncertainty in Measurement. Published by BIPM, IEC, ISO, OIML and IFCC (International Federation of Clinical Chemistry), IUPAC (International Union of Pure and Applied Chemistry) and IUPAP (International of Pure and Applied Physics).