The author's wish is to characterize the role of information technology systems in improving the efficiency of human resource management. The role of information technology systems in management significantly changes HRM principles. These changes are, for the most part, positive, but it must be remembered that we are not always pleased with the application of information technology. Information technology provides the staff of HRM divisions/sections with new possibilities, but also puts new challenges before them. Due to present trends in the development of new forms of organization that have occurred under the influence of information technology, including the Internet, questions of knowledge management and virtualization as well as their respective consequences are presented more broadly.