The Pacific Rim, referring to countries and economies bordering the Pacific ocean, is an informal, flexible term which generally has been regarded as a reference to East Asia, Canada, and the United States. At a minimum, the Pacific Rim includes Canada, Japan, the People's Republic of China, Taiwan, and the United States. It may also include Australia, Brunei, Cambodia, Hong Kong/Macau, Indonesia, Laos, North Korea, South Korea, Malaysia, New Zealand, the Pacific Islands, the Philippines, Russia (or the Commonwealth of Independent States), Singapore, Thailand, and Vietnam. As an evolutionary term, usage sometimes includes Mexico, the countries of Central America, and the Pacific coast countries of South America.