This paper charts the transformation of the employment relationship in different industries during the second quarter of this century and is based on a representative sampling of U.S. business organizations. The first section documents changes in the control systems that prevailed in U.S. industries between the Depression and the end of World War 11. The descriptive analyses generally corroborate portraits that have recently been provided by neo-Marxists of how and where technical and bureaucratic controls evolved. The second section sketches an explanation for the rapid diffusion of bureaucratic controls that apparently occurred between 1939 and 1946. It examines the role of three key constituencies in shaping modern systems of work force ...