This document discusses different levels of strategy within an organization. It defines key terms like industry, value chain, company, and market. It then explains Rumelt's typology of diversification which categorizes companies based on their revenue sources. The document outlines some common levels of strategy as corporate, business, functional, and operational. It provides examples of each level and how the levels support each other. Finally, it includes organization charts to illustrate how strategies are implemented within single product, related product, and unrelated product businesses.