United Nations Relief and Rehabilitation Administration.

(a) = sense (b); abbreviated UNO n. at U, n.1 initialisms 1a; (b) (with lower-case third initial) any organization that is under the general…

United Nations Educational, Scientific, and Cultural Organization.

United Nations International Children's Emergency Fund (now officially the United Nations Children's Fund).

United Nations Relief and Works Agency (originally for Palestine Refugees in the Near East).

United Nations Refugee Emergency Fund.

United Nations Conference on Trade and Development.

United Nations Development Programme.

United Nations Industrial Development Organization.

United Nations Environment Programme.