The Organization for Security and Co-operation in Europe (OSCE) is the world's largest security-oriented intergovernmental organization. Its mandate includes issues such as arms control and the promotion of human rights, freedom of the press and fair elections. It has 550 staff at its headquarters in Vienna, Austria, and 2,300 field staff. It has its origins in the 1975 Conference on Security and Co-operation in Europe (CSCE) held in Helsinki, Finland. The OSCE is concerned with early warning, conflict prevention, crisis management, and post-conflict rehabilitation. Its 57 participating states are located in Europe, Asia and North America and cover most of the land area of the Northern Hemisphere. It was created during the Cold War era as an East–West forum.