Headquarters of the United Nations be sent by courier. The United Nations Postal Administration issues stamps, which must be used on stamped mail sent from the building. For award purposes, amateur radio operators consider the UN headquarters a separate "entity" under some award programs such as DXCC. For communications, UN organizations have their own internationally recognized ITU prefix, 4U. However, only contacts made with the UN Headquarters in New York, and the ITU count as separate entities. Other UN organizations such as the World Bank count for the state or country they are located in. The UN Staff Recreation Council operates amateur radio station 4U1UN,
The Holocaust and the United Nations Outreach Programme camp in 1945. The Programme unveiled the permanent exhibit on the "Holocaust and the United Nations" at United Nations Headquarters in January 2008. The exhibit, developed with the assistance of Holocaust scholars, presents an overview of the Holocaust in the context of World War II and the founding of the United Nations. It is seen by the 400,000 visitors who visit United Nations Headquarters annually. The Holocaust and the United Nations Outreach Programme has screened a dozen documentary and feature films on the Holocaust and the prevention of genocide. Many of the films have been shown both at the United