Enlargement of the United Nations members, or were dissolved. The UN officially came into existence on 24 October 1945, after ratification of the United Nations Charter by the five permanent members of the United Nations Security Council (China, France, the Soviet Union, the United Kingdom, and the United States) and a majority of the other signatories. A total of 51 original members (or founding members) joined that year; 50 of them signed the Charter at the United Nations Conference on International Organization in San Francisco on 26 June 1945, while Poland, which was not represented at the conference, signed it on 15 October 1945. Below
San Francisco in the 1970s the 21st century with the creation of the Exotic Erotic Ball in 1979. The San Francisco Bay Area continued to be a leading academic centre in the 1970s, centred around the major universities of Stanford University and Berkeley. In May 1972, for instance, the first demonstration of acupuncture in San Francisco was held at Stanford which attracted some 1,400 physicians. The 1970s also brought other major changes to the city such as the construction of its first subway system, BART, which connected San Francisco with other cities in the Bay Area. At stations in downtown San Francisco, BART connects with