The CCU was set up in 1964, to replace the "Commission for the System of Units", set up by the CIPM in 1954.
Present activities concern matters related to the development of the International System of Units (SI), preparation of successive editions of the SI brochure, and advice to the CIPM on matters concerning units of measurement.
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The new BIPM website
The BIPM is proud to present its new website, with an updated design and personalized content. Those entitled to access restricted documents will need to set up a personal password: click on SIGN IN in the header, then on Password forgotten and enter your email address as registered in the BIPM Meetings Office database.
Review paper in Metrologia: "The revision of the SI - the result of three decades of progress in metrology"
Following three decades of intensive work by the world-wide metrology community, the 26th meeting of the CGPM agreed a major revision of the SI on 16 November 2018. This open-access review paper in Metrologia describes the changes.