Think of the tiny robots swimming through your blood vessels all over your body and fighting your enemies. Fascinating! Isn't it? The picture you are having in your mind right at this moment could be possible only because of the blessings of nanotechnology. When you apply genetic engineering in microorganisms, say bacteria, to attain your goal of curing various types of problems that living organisms might have, can be termed as nanobiotechnology. To define nanotechnology, it is stated that nanotechnology is the understanding and control of matter at dimensions between approximately 1 and 100 nanometers, where unique phenomena enable novel applications.