Periphery Countries: Periphery countries are less developed nations that rely on core countries for economic resources and often have lower standards of living.
Semi-periphery Countries: Semi-periphery countries are in-between core and periphery countries, having some characteristics of both. They may have moderate development but still face challenges in achieving the same level as core nations.
Global North: The term 'Global North' refers to the wealthier, more industrialized regions of the world, which include many core countries.