Biotechnology is a rapidly growing field of Biological Science due to its wide application in several branches of applied science. It has immense potential for its application in industrial microbiology, environmental microbiology, production of antibiotics and vaccines, immunology and serology. Biotechnology is also applied for use of microbes in biodegradation, biotransformation, bioremedian and biocontrol. Thus, biotechnology not only attracts the attention of biologist but also of environmentalist, chemist, and pharmacist. This book has been prepared to fulfill this requirement. It is the first attempt ever of its kind, undertaken with a view to provide distinct advantage of its user towards instant understanding of technical terms. special efforts have been made towards recent development in the subject to keep the content up-to-date. It includes about 1000 technological terms.