The main idea of the book is to analyze the present theory and methodology of interdisciplinarity, the application of the general theory in four disciplines of the applied economy (namely, world economy/globalization, management, accountancy science, and marketing) to compare the interaction of real globalization and its reflections in forms and levels/degrees of interdisciplinarity of the four disciplines, and to find out and examine the disciplines that serve to the above mentioned four disciplines as their infrastructures. It compares specific features of interdisciplinarity in all the four applications and includes the research results of their comparison into the general theory and methodology of interdisciplinarity and the utilization of the theory and methodology in practice. This book is recommended for researchers researching into identical or similar topics, practitioners (experts, specialists or employees of big companies in charge of research activities), academic research teams researching into similar topics, academic teachers, individual researchers interested in relevant topics, and university students.