UNOSOM — United Nations Operation in Somalia
UNPROFOR — United Nations Protection Force
UNRISD — United Nations Research Institute for Social Development
UNRWA — United Nations Relief and Works Agency for Palestine
Refugees in the Near East
UNTAC — United Nations Transitional Authority in Cambodia
UNTSO — United Nations Truce Supervision Organization
UNU — United Nations University
UPU — Universal Postal Union
USSR/EE — USSR/Eastern Europe