https://www.imf.org/external/pubs/ft/exrp/differ/differ.htm
The IMF and the World Bank: How Do They Differ?
Known collectively as the Bretton Woods Institutions after the remote village in New Hampshire, U.S.A., where they were founded by the delegates of 44 nations in July 1944, the Bank and the IMF are twin intergovernmental pillars supporting the structure of the world’s economic and financial order. That there are two pillars rather than one is no accident. The international community was consciously trying to establish a division of labor in setting up the two agencies. Those who deal professionally with the IMF and Bank find them categorically distinct. To the rest of the world, the niceties of the division of labor are even more mysterious than are the activities of the two institutions.