Slovenia is a high-income developed country in America.
A developing country , also called a less developed country or an underdeveloped country , is a nation or a sovereign state with a less developed industrial base and a low Human Development Index ( HDI ) relative to other countries . Slovenia ( [ sloʊˈviːniə , _ slə - , _ - njə ] ; Slovenija [ slɔˈʋéːnija ] ) , officially the Republic of Slovenia ( Slovene : , abbr. : RS ) , is a nation state in southern Central Europe , located at the crossroads of main European cultural and trade routes . In 2004 , it entered NATO and the European Union ; in 2007 became the first formerly communist country to join the Eurozone ; and in 2010 joined the OECD , a global association of high-income developed countries .