There are many criteria for creating systems of subregions; this article is focusing on the United Nations geoscheme, which is a changing, constantly updated, UN tool based on specific political geography and demography considerations relevant in UN statistics.
[1] In 1999, it developed a system of macro-geographical (continental) regions, subregions, and other selected economic groups to report advances towards achieving numerous millennial development goals worldwide.
[2] The division's first publication was the book World's Women 2000: Trends and Statistics in 2000.
[3] The following is a non-exhaustive list of subregions, arranged alphabetically by region (i.e., by continent); in the UN geoscheme, higher-level, macro-geographical regions are arranged to the extent possible according to continents.
Eurasia is a continental mainland comprising the continents of Asia and Europe.