Thatâs capital delta (lower case is Î´), a letter of the Greek alphabet. It can be used in equations just like normal letters in a similar manner to x. It is usually used to represent: a difference. an angle.
Roosevelt also sought to convince the public that an international organization was the best means to prevent future wars. The Senate approved the UN Charter on July 28, 1945, by a vote of 89 to 2. The United Nations came into existence on October 24, 1945, after 29 nations had ratified the Charter.
According to The United Nations website there are currently (2011) 193 member states in the UN. In addition there are two non-member states with permanent observer status: The Holy See (Vatican) and Palestine. The international organization was founded by representatives of 51 countries immediately after World War II, on October 24, 1965.