U
UDEAC	Economic and Monetary Community of Central Africa (now CEMAC)
UEMOA	West African Economic and Monetary Union
UIN	Unique Identifier Number
ULCC	Ultra large crude carrier
UMA	Arab Maghreb Union
UN	United Nations
UNAIDS	Joint United Nations Programme on HIV/AIDS
UNCITRAL	United Nations Commission on International Trade Law
UNCTAD	United Nations Conference on Trade and Development
UNCTC	United Nations Center on Transnational Corporations
UN/DESA/SD	United Nations Department of Economic and Social Affairs, Statistics Division
UNDP	United Nations Development Program
UNEP	United Nations Environment Program
UNESCO	United Nations Educational, Scientific, and Cultural Organization
UNICEF	United Nations Children Fund
UNIDO	United Nations Industrial Development Organization
UK	United Kingdom
UR	Uruguay Round
URAA	Uruguay Round Agreements Act
USAID	U.S. Agency for International Development
USF&CS	United States Foreign and Commercial Service
US	United States
USA	United States of America
USC	United States Code
USDA	United States Department of Agriculture
USDOC	United States Department of Commerce
USEC	United States Mission to European Communities
USITC	United States International Trade Commission
USOECD	United States Mission to the Organization for Economic Cooperation and Development
USP	United States Price
US-SACU FTA	US-Southern African Customs Union Free Trade Area
USTR	United States Trade Representative, or Office of the United States Trade Representative
USTTA	United States Travel and Tourism Administration, U.S. Department of Commerce
USUN	United States Mission to the United Nations