In order for corporations to successfully develop an adequate supply of employees for managerial positions, one must know: (1) how the manager's job will change in the future; (2) how development programs can change the qualifications of potential mangers; and (3) how to recognize and measure effective management. The utility of computers to simulate business decisions and their effects will be a major factor in the future. A very wide variety of management development courses now exist. There is confusion about both the nature of management jobs and criteria for measuring a manager's effectiveness. Further research is needed. Paper presented at APA, Philadelphia, September 1963.