This document provides an introduction to economics. It defines economics as the study of proper allocation of scarce resources for satisfying human wants and needs. Economics has two main branches: microeconomics, which focuses on individual decision making units like households and firms, and macroeconomics, which looks at the overall economy and factors influencing national income. Positive economics attempts to understand and explain economic behavior without judgment, while normative economics makes judgments on outcomes and policies. The document outlines key economic concepts like scarcity, resources, efficiency and the scientific methods used in economics like observation, analysis and statistics. It concludes by listing various fields within economics.