The Archives contains the administrative and operational records created by the World Bank Group institutions, and offers a vast amount of original primary source research material related to economic development. The primary records contained in the World Bank Group Archives are the operational correspondence records for each country. These records, which are located in the six Regional Vice Presidency fonds contain general information about member countries and detailed information on each development project carried out in the country. The operational correspondence records are a source of historical information on the country economy as a whole, as well as the status of particular sectors of the economy, such as transportation, rural development, education, health and nutrition, infrastructure, etc. The World Bank Group Archives also contains a large amount of non-textual records such as photographs and audio-visual materials related to development projects and development assistance, as well as oral history interviews conducted with individuals significant in Bank Group history.