The human resources of a company play a major part in its development.The concept of human resources is not new. Peter Drucker in his book "The Practice of Management" underpinned the three functions of management: the achievement of economic performance, the leading of managers and the management of workers and labor. Human resources can be defined as one of the most important investments an organization can make whose results become more evident over time. It can be said that human resources are the organization itself.