developing country(A country whose people are beginning to utilize available resources in order to bring about a sustained increase in per capita production of goods and services)
less developed country(One of the world's poorest nations, typically small in area and population, with low per capita incomes, literacy levels and medical standards, subsistence agriculture and a lack of exploitable minerals and competitive industries)
developed country(A nation possessing a relatively high degree of industrialization, infrastructure and other capital investment, sophisticated technology, widespread literacy and advanced living standards among its populations as a whole)