This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book attempts to identify some principal dimensions of the process of market and job restructuring by means of case studies of service companies. It identifies emerging new processes of segmentation by means of some case studies of service firms. The book examines the new processes of segmentation and to show the new labor market interactions being brought about among major groups of workers. It explores the size of a firm as a determinant of the personnel organization appears far less important than it once was, thus weakening limitations arising from size-of-firm differences. The rise of the new economy is bringing about a fundamental restructuring of both markets and jobs. In the late 1960s and early 1970s, as employment and output growth shifted to services and high-technology areas, a new market structure began taking shape.