This document discusses business models and their components. It outlines that a business model is an abstract representation of a firm's strategy that outlines how it can deliver value to customers. The key components of a business model include the value proposition, market segment, value chain structure, revenue generation and margins, position in the value network, and competitive strategy. New business models for the internet economy and e-commerce business models are also discussed. Finally, the concept of the triple bottom line is introduced as assessing financial, social and environmental impacts.