This document summarizes different types of organizational structures: line, functional, line and staff, divisional, project, and matrix. It discusses the key characteristics of each structure, including advantages and disadvantages. For example, it notes that a line structure is simple and easy to understand but can lack coordination. A functional structure provides specialist expertise but can violate the unity of command principle. It also defines and compares centralization versus decentralization of authority, noting decentralization involves systematic delegation of power throughout the levels of management.