The name Indonesia has its roots in two Greek words: "Indos" meaning Indian and "Nesos" which means islands. It is an appropriate description of the archipelago as there are estimated to be a total of 17,508 islands, of which only about 6,000 are inhabited, stretching for 5,150 km between the Australian and Asian continental mainlands and dividing the Pacific and Indian Oceans at the Equator.
Five main islands and 30 smaller archipelagoes are home to the majority of the population. The main islands are Sumatra, Kalimantan, Sulawesi, Irian Jaya, and last but not least Java, home to 70 percent of the country's population. Indonesia shares Irian Jaya with Papua New Guinea and two thirds of the island of Kalimantan with Malaysia and Borneo.