I am glad to present this book, especially designed to serve the needs of the students of BBA, MBA, B.Com, M.Com, LL.B, M.Phil etc. The book has been written keeping in mind the general weakness in understanding the fundamental concepts of the topics. The book is self-explanatory and adopts the “Teach Yourself” style. The language of this book is quite easy and understandable based on scientific approach. Any further improvement in the contents of the book by making corrections, omission and inclusion is keen to be achieved based on suggestions from the readers for which the author shall be obliged. I acknowledge special thanks to Dr. Pankajkumar Anawade, who is the backbones and main concept provider and also have been constant source of motivation throughout this Endeavour. He played an active role in coordinating the various stages of this Endeavour and spearheaded the publishing work. At last but not least, our special thanks to Prof. (Dr.) Preeti Agarwal, Director, G. H. Raisoni Institute of Business Management, Jalgaon, Prof. (Dr.) Anil P. Dongre (Director, School of Management Studies, KBC,NMU, Jalgaon and Prof. (Dr.) Arundhati Ninawe Professor & Head of Department PGTD (Commerce & Management) Gandwana University, Gadchiroli. I look forward to receiving valuable suggestions from professors of various educational institutions, other faculty members and students for improvement of the quality of the book. The reader may feel free to send in their comments and suggestions to the under mentioned address.