This document defines key concepts related to economic and social development. It discusses two types of development - economic development shown through improvements in agriculture, industry, trade, and material production, and social development shown through improvements in education, health, transportation, and other social services. Development can be measured at the individual level, looking at factors like education and income, and at the national level, looking at indicators such as per capita income, life expectancy, and literacy rates. Financial institutions like banks and non-banks play an important role in economic development by mobilizing savings and providing loans, investments, and employment opportunities. Both government and private sectors contribute to development through policies, trade, infrastructure, and production of goods and services.