国際度量衡委員会
In 1935 this was adopted by the International Electrotechnical Commission (IEC) as the "M.K.S. System of Giorgi" without specifying which electromagnetic unit would be the fourth base unit. In 1946 the International Committee for Weights and Measures (CIPM) approved a proposal to use the ampere as that unit in a four-dimensional system, the MKSA system.