Укр 
Eng 
The International Organization of Legal Metrology, is an intergovernmental organisation that was created in 1955 to promote the global harmonisation of the legal metrology procedures that underpin and facilitate international trade.
TC 1 - Terminology
TC 3 - Metrological control
TC 4 - Measurement standards and calibration and verification devices
TC 6 - Prepackaged products
TC 9 - Instruments for measuring mass and density
TC 12 - Instruments for measuring electrical quantities
TC 14 - Measuring instruments used for optics
TC 16 - Instruments for measuring pollutants
TC 18 - Medical measuring instruments