The document traces the evolution of human resource management (HRM) from a personnel management focus on hiring and firing to a more strategic approach. It discusses how HRM has expanded to include additional functions like training, compensation, and organizational design. The key difference between personnel management and HRM is that HRM views employees as important assets and tries to develop the whole organization, not just improve efficiency. The document also outlines models of HRM, including its core functions and challenges in an increasingly globalized business environment.