International Union of Pure and Applied Physics

IUPAP carries out this mission by: sponsoring international meetings; fostering communications and publications; encouraging research and education; fostering the free circulation of scientists; promoting international agreements on the use of symbols, units, nomenclature and standards; and cooperating with other organizations on disciplinary and interdisciplinary problems.Therefore it is very important .
IUPAP is a member of the International Science Council.
IUPAP is the lead organization promoting the adoption of the International Year of Basic Sciences for Sustainable Development, a proposal to be considered by the 76th session of the UN General Assembly. Provided by Wikipedia