The document discusses the key components of an organization's human resource development (HRD) system. It describes HRD as a set of planned activities designed to provide employees with necessary skills. The HRD system consists of four main sub-systems: 1) the career system ensures attraction and retention of employees, 2) the work system utilizes employees to achieve organizational objectives, 3) the development system continuously develops employees' skills, and 4) the self-renewal system renews and rejuvenates the organization itself.