The use of EDP techniques is increasingly changing business economics issues and problem-solving approaches, with far-reaching effects on the structure and market position of the firm. At the same time business economics methods and techniques can be employed to achieve an optimal application of information technology. This book examines the influences in both directions betweeen computer science and business economics, for concrete information and communication techniques such as the use of databases, networking, CASE and interactive processing. The important results are incorporated and summarized in an EDP-oriented business economics information model. In comparison with the first edition of the book, new EDP techniques, such as expert systems and data modelling, receive greater attention. The entire contents have been completely revised, restructured and extended. The book provides a suitable basis for courses on "Information Systems for Business Economics" or "Information Management." Practical examples and the emphasis on applications interdependences renders the book also of interest to practitioners from specialist economics and EDP departments. The reciprocal influences between EDP and business economics are valid not only in theory but also for practical use in the enterprise. This book is therefore addressed not only to students, but also to those engaged in areas of theoretical or practical business economics.