First new SI prefixes for over 30 years

The International Bureau of Weights and Measures (BIPM) has formally approved the use of four new SI prefixes to meet the growing needs of science, computing and the increasing amount of online data and to prevent the adoption of unofficial prefix names. The approval of the new prefixes was one of the resolutions of the 27th General Conference on Weights and Measures, which took place on 15-18 November 2022.

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The DfT’s duplicated reports

When Ronnie Cohen was researching the use of miles and kilometres for other articles, he came across several instances of metric and imperial versions of the same report produced by the DfT. In this article he gives details.

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