The Pacific Islands are the islands of the Pacific Ocean. Three major groups of islands in the Pacific Ocean are Polynesia, Micronesia and Melanesia. Depending on the context, Pacific Islands may refer to countries and islands with common Austronesian origins, islands once or currently colonized or Oceania. The indigenous inhabitants of the Pacific Islands are referred to as Pacific Islanders. This is a list of many of the major Pacific islands, organized by archipelago or political unit. In order to keep this list of moderate size, links are given to more complete lists for countries with large numbers of small or uninhabited islands.