This document analyzes HP, Dell, and Lenovo using Porter's Five Forces framework. It summarizes HP's strengths as its strong brand, size and scale, and investment in innovation. It also discusses HP losing market share to Lenovo in 2012 due to leadership changes and lack of strategy. The document then analyzes Lenovo's strategy of targeting businesses and governments with a variety of laptops. It notes Dell pioneered balancing finances through direct sales but now faces threats from other PC manufacturers.