 International Union of Pure and Applied Chemistry The International Union of Pure and Applied Chemistry I-U-P-A-C-Slash-A-Questionmark-Ju-Questionmark-PAC Ju-Questionmark-Slash is an international federation of national adhering organizations that represents chemists in individual countries. It is a member of the International Council for Science ICSU. I-U-P-A-C is registered in Sieb-Iroch, Switzerland, and the Administrative Office, known as the I-U-P-A-C Secretariat is in Research Triangle Park, North Carolina, United States. This administrative office is headed by I-U-P-A-C's Executive Director, currently in S-O-B-E. I-U-P-A-C was established in 1919 as the successor of the International Congress of Applied Chemistry for the advancement of chemistry. Its members, the national adhering organizations, can be National Chemistry Societies, National Academies of Sciences, or other bodies representing chemists. There are 54 national adhering organizations and 3 associate national adhering organizations. I-U-P-A-C's Interdivisional Committee on Nomenclature and Symbols I-U-P-A-C Nomenclature is the recognized world authority in developing standards for the naming of the chemical elements and compounds. Since its creation, I-U-P-A-C has been run by many different committees with different responsibilities. These committees run different projects which include standardizing nomenclature, finding ways to bring chemistry to the world, and publishing works. I-U-P-A-C is best known for its work standardizing nomenclature in chemistry and other fields of science, but I-U-P-A-C has publications in many fields including chemistry, biology and physics. Some important work I-U-P-A-C has done in these fields includes standardizing nucleotide base sequence code names, publishing books for environmental scientists, chemists, and physicists, and improving education in science. I-U-P-A-C is also known for standardizing the atomic weights of the elements through one of its oldest standing committees, the Commission on Isotopic Abundances and Atomic Weights CIA-A-W.