In 1967 the Survey Research Center at the University of Michigan conducted a nationwide survey to determine the impact of changes in machine technology on a cross-section of the labor force. Although many studies have been made about automation, this study was larger in scope than most research and made use of cross-sectional analysis to show the frequency of changes in machine technology and in what occupational and educational groups they occurred. Over a 5-year period about 10 percent of the labor force underwent one or more changes in machine technology which altered their work significantly, and technological advance changed about 2 or 3 percent of all jobs a year, about 1.5 to 2 million jobs. Individual chapters in this report contain detailed information on: (1) Machinery Use by the Work Force, (2) Change in Machine Technology, (3) Change-over Process to New Equipment, (4) Economic Consequences of Machine Technology, (5) Impact of Changes on Perceived Job Characteristics and Job Satisfaction, (6) Analyses of Cases who made a Poor Adjustment to Technological Change, and (7) Role of Education in Relation to Technological Change. (BC)