This document summarizes Porter's generic strategies of cost leadership, differentiation, and focus as applied to various companies. It discusses Southwest Airlines' strategy of cost leadership in the airline industry by being more efficient and passing on savings to customers. It also discusses Starbucks' differentiation strategy of offering customized coffee drinks and investing in employee benefits and culture. Finally, it briefly discusses Zendesk's focused differentiation strategy of providing a cloud-based customer service platform and positioning itself as a thought leader in the industry.