The subseries consists of files on international, regional and national governmental organizations that had official relations or some sort of exchange with the IBI. Most files are relatively thin, with the exception of the following: relations with UNESCO (IBI/6/1/1/34) and relations with UNCTAD (IBI/6/1/1/32). The files appear to be complete although it is likely, as with other series, that there are gaps in the correspondence for years prior to 1980.