| United Nations Interim Force In Lebanon | United Nations Interim Force in Lebanon |
| United Nations Mission in Liberia | United Nations Mission in Liberia |
| United Nations Relief and Rehabilitation Administration | United Nations Relief and Rehabilitation Administration |
| United Paramount Network | UPN |
| United Parcel Service | United Parcel Service |
| United Progressive Party | United Progressive Party |
| United Republic | National anthem of Yemen |
| United States Agency for International Development | United States Agency for International Development |
| United States Air Force | United States Air Force |
| United States Air Force Academy | United States Air Force Academy |
| United States Air Forces in Europe | United States Air Forces in Europe |
| United States Armed Forces | Military of the United States |
| United States Army | United States Army |
| United States Census Bureau | United States Census Bureau |
| United States Coast Guard | United States Coast Guard |
| United States Department of Agriculture | United States Department of Agriculture |
| United States Department of Commerce | United States Department of Commerce |
| United States Department of Defense | United States Department of Defense |
| United States Department of the Navy | United States Department of the Navy |
| United States Department of the Treasury | United States Department of the Treasury |
| United States Department of War | United States Department of War |
| United States Geological Survey | United States Geological Survey |
