This book is useful for B.Com, C.A, C.S, LL.B, LL.M, MBA Courses of our country. The present Edition of the book has several unparallel features which make it distinct from the other books. These are- 1.The subject matter has been presented in a self-explanatory and to the point manner. 2.The subject matter has been arranged in a pares and sub-pares with suitable headings. 3.Large numbers of case laws are given to understand the subject. . I am confident that above features would make this edition an invaluable asset to students, Professors of Law, Commerce & Management including Ngo's, Trade Unions Organizations. I wish to express my sincere thanks to several individuals who have been a source of inspiration and support both personally. In addition the book brings various critical perspective, the better to foster an understanding of the subject.