International Bureau of Weights and Measures
The International Bureau of Weights and Measures is an organization that is based in Sèvres near Paris in France. Its name in French is "Bureau international des poids et mesures". The abbreviation of its name in all languages is BIPM. These are the letters of the name in French.
It was established in 1875 and has laboratories and offices. Scientists use the laboratories to compare measurements that are made in different countries. The offices are used for meetings where scientists discuss the best way to make sure that all countries use the same measurements.