"It contains some 5,200 English descriptors (or preferred terms). An additional 6,900 non-preferred terms guide the user to preferred terms. Developed as an indexing and retrieval tool for the ASC library collection, the African Studies Thesaurus reflects the characteristics and main thematic areas of the collection. Specific Africa-related descriptors include the names of countries and regions, ethnic groups, African languages, African polities and political parties in Africa. It is used for indexing and retrieving material in the library collection and is directly linked to the catalogue."