CIA World Factbook
U.S. government profiles on the countries of the world with maps, statistics and information for each about geography, the people and society, government, economy, communications, transportation, military and transnational issues.
            www.cia.gov/library/publications/the-world-factbook

United Nations
UN maps and indepth information about humanitarian and legal issues around the world.  Not all member states are recognized by all other member states.  For the purposes of the information linked above, 193 member states are listed along with Kosovo and Vatican City (see footnotes on Europe page).
            www.un.org/en/members

Maps and facts about our world
Oceania
Interactive mapping; click a continent for access to:
Country list AND
Presentation list
2008-2019 Worldwide Foreign Travel Club