The Postal Development Indicator was developed by the

Universal Postal Union The Universal Postal Union (UPU, french: link=no, Union postale universelle), established by the Treaty of Bern of 1874, is a specialized agency of the United Nations (UN) that coordinates postal policies among member nations, in addition to t ...

in 2012 to rank member countries according to various measures of an economic nature including

gross national income The gross national income (GNI), previously known as gross national product (GNP), is the total domestic and foreign output claimed by residents of a country, consisting of gross domestic product (GDP), plus factor incomes earned by foreign ...

, population, percentage of postal home delivery, and surface area of the country. The

United Nations Economic and Social Council The United Nations Economic and Social Council (ECOSOC; french: links=no, Conseil économique et social des Nations unies, ) is one of the six principal organs of the United Nations, responsible for coordinating the economic and social fields ...

(ECOSOC) classifications of least developed countries (LDCs),

Small Island Developing States Small Island Developing States (SIDS) are a group of developing countries that are small island countries which tend to share similar sustainable development challenges. These include small but growing populations, limited resources, remoteness, ...

(SIDS) and

landlocked developing countries The landlocked developing countries (LLDC) are developing countries that are landlocked. The economic and other disadvantages experienced by such countries makes the majority of landlocked countries the least developed countries (LDCs), with inhab ...

(LLDC) are also taken into account.

References

Universal Postal Union {{measurement-stub