Brunei , officially the Nation of Brunei, the Abode of Peace (, Jawi: , ), is a sovereign state located on the north coast of the island of Borneo, in Southeast Asia. Apart from its coastline with the South China Sea, it is completely surrounded by the state of Sarawak, Malaysia, and it is separated into two parts by the Sarawak district of Limbang. It is the only sovereign state completely on the island of Borneo, with the remainder of the island belonging to Malaysia and Indonesia. Brunei's population was 401,890 in July 2011. Brunei regained its independence from the United Kingdom on 1 January 1984. Economic growth during the 1970s and 1990s, averaging 56% from 1999 to 2008, has transformed Brunei Darussalam into a newly industrialised country.
Brunei has the second highest Human Development Index among the South East Asia nations after Singapore, and is classified as a developed country. According to the International Monetary Fund (IMF), Brunei is ranked 5th in the world by gross domestic product per capita at purchasing power parity. The IMF also states in a 2011 estimate that Brunei was one of two countries (the other being Libya) with their public debt at 0% of the national GDP. Forbes also ranks Brunei as the fifth richest nation out of 182 nations due to its extensive petroleum and natural gas fields.