This book would enable the students to develop interest and appreciate the role of biotechnology for future research and advancement of agriculture, veterinary, biomedical, industrial development and environmental protection for the welfare of society. The aim of this textbook is not only to bring together the various fields of biotechnology, but also to present the basics behind each of these potential biotechnologies in the understandable form. The book also attempts to compile some of the biotechnological processes for their easy access at a single platform which at present, is lacking. The target of the textbook is to give students a complete view of know-how of biotechnology, especially those who have just ventured into this field and need a head start. Diverse technologies with their basic principles and practices along with potential biotechnologies emerging in recent-past are explained in very easy language and with the help of illustrations.