This document provides an introduction to public administration. It begins by explaining how kingdoms were administered in the past by a few chosen individuals selected by monarchs. As societies modernized, governments took on expanding roles and responsibilities. By the 19th century, a formalized bureaucratic approach to public administration developed. Public administration now plays an integral role in governance and policy implementation. It defines public administration and compares it to private administration, noting both share managerial functions but public administration serves the public interest. The document outlines different views of public administration and discusses principles, models and functions of public sector management.