This document summarizes key aspects of organization structure including the six elements that define structure, characteristics of common structure types, and factors that influence structure choice. It discusses work specialization, departmentalization, chain of command, span of control, centralization, and formalization. Structure types like bureaucracy, matrix, virtual and boundaryless organizations are described. Mechanistic and organic structures are contrasted and determinants of structure like strategy, size, and technology are listed. The implications of structure for employee behavior are also summarized.