This document provides an introduction to economics, including key definitions and concepts. It explains that economics is the study of how people make choices to satisfy their needs and wants. There are two main categories: microeconomics, which examines choices by households, companies and individual markets, and macroeconomics, which examines behavior across entire economies. It defines important economic terms like consumers, producers, goods, services, needs, wants, resources and factors of production. The four main factors of production that resources can be divided into are natural resources, human resources, capital resources and entrepreneurship.