The United Nations Committee on the Peaceful Uses of Outer Space (COPUOS) was established in 1959 (shortly after the launch of Sputnik) as an ad hoc committee. In 1959, it was formally established by United Nations resolution 1472 (XIV).
The mission of COPUOS is "to review the scope of international cooperation in peaceful uses of outer space, to devise programmes in this field to be undertaken under United Nations auspices, to encourage continued research and the dissemination of information on outer space matters, and to study legal problems arising from the exploration of outer space."
The United Nations Office for Outer Space Affairs (UNOOSA) is Secretariat to the Committee. All documents related to the Committee and its subcommittees, the Scientific and Technical Subcommittee and the Legal Subcommittee, can be found at the UNOOSA website.
The United Nations involvement in space related activities can be traced back to the beginning of the Space Race. After the first man-made object orbited the Earth in 1957, the UN has focused on ensuring outer space is used for peaceful purposes. The Launch of Sputnik marked the beginning of the Space Race as well as the beginning of satellite use for the advancement of science.
As the Cold War began, fear of Outer Space being used for military purposes spread through the international community. This lead to the creation of multiple organizations with the intent of governing how outer space can be used in order to assure it does not become the next frontier for conflict.
In 1958, the United Nations established the Committee on the Peaceful Uses of Outer Space which originally consisted of 18 members: Argentina, Australia, Belgium, Brazil, Canada, Czechoslovakia, France, India, Iran, Italy, Japan, Mexico, Poland, Sweden, the Union of Soviet Socialist Republics, the United Arab Republic, the United Kingdom of Great Britain and Northern Ireland, and the United States of America.