The biographical indexes, part of the World Biographical Information System (WBIS) and used as indexes for the Biographical Archives , serve as an independent biographical research tool, with each index containing short biographical entries on individuals relating to a certain biographical or cultural region, and each entry including names, biographical data, professions and evaluated sources.The Arab-Islamic Biographical Index II contains summarised information on around 110,000 individuals from the pre-Islamic period to the present. It includes not only individuals who were born in the Arabian region, but also foreigners who were active within it.