DNA Fingerprinting is a method of identification that compares fragments of deoxyribonucleic acid (DNA) It is sometimes called DNA typing. DNA is the genetic material found within the cell nuclei of all living things. The techniques used in DNA fingerprinting also have applications law and law enforcement, palaeontology, archaeology, various fields of biology, and medical diagnostics. In biological classification, it can help to show evolutionary change and relationships on the molecular level, and it has the advantage of being able to be used even when only very small samples are available. This book details several applications of this break-through technique.