| UNO came into existence as a result of the United Nations Conference on International Organisations in 1945 in San Francisco to draw up the United Nations Charter. |
| UN charter was signed on 26 Jun 1945 by 51 founding members. |
| Declaration of United Nations was drafted by Franklin Roosevelt, Winston Churchill, Harry Hopkins (Roosevelt aide) |
| Four Policeman was coined to refer to US, UK, Soviet Union and China. |
| US President Franklin D. Roosevelt coined the term United Nations |
| Charter came into force 24 Oct 1945 which is observed as UN Day. |
| 1st Secretary General – Trygve Lie Norwegian Foreign Minister |
| It has its headquarters in Manhattan, New York (USA) |
| It also has offices at Geneva, Vienna and Nairobi. |
| The number of official languages of the UNO are SIX viz. 1. Arabic, 2. Chinese, 3. English, 4. French, 5. Russian and 6. Spanish |
| Total number of member States as of Sep 2017 is 193 |
| It has TWO observer States namely Holy See (Vatican City) and Palestine |
| It has SIX principal organs – 1. General Assembly 2. Security Council 3. Economic and Social Council 4. Secretariat 5. International Court of justice 6. UN Trustership Council. (inactive since 1994) |
| The organisation won the Nobel Peace Prize in 2001 |
