This document summarizes the organizational structure of Infosys over time. It started with a hierarchical structure in 1991-1992 as it grew, then implemented a matrix structure from 1992-2011 to facilitate innovation and expansion. From 2011 onward, Infosys had a flat structure with founders making major decisions. It is now organized into four industry units. The document also discusses advantages like improved agility and flexibility, and disadvantages such as potential power struggles and slow decision making that can come with complex matrix structures.