International Relations is the branch of political science concerned with the foreign affairs of and relations among countries. Below are a few terms you should familiarize yourself with.
The International Monetary Fund (IMF) and the World Bank are institutions in the United Nations system. They share the same goal of raising living standards in their member countries. Their approaches to this goal are complementary, with the IMF focusing on macroeconomic issues and the World Bank concentrating on long-term economic development and poverty reduction. Source: IMF, 2015.