The world has witnessed in the previous years and still a number of changes in all aspects of modern life differs from what have prevailed in the previous centuries until the beginnings of the eighties of the twentieth century, a result of these changes which covered all the economical, social and political aspects in the countries of the world of different degrees of advance and development, the appearance of distinguished. The human resources are considered the main wealth for the nations where the material capital and the human resources are in spite of their importance and necessity, because the human have the ability to use the human resources in the productive processes to obtain possible utmost degree to realize the welfare.