?Nanotechnology has given us the tools?to play with the ultimate toy box of nature- atoms and molecules. Everything is made from it?The possibilities to create new things appear limitless.? Blanket term used to describe the precision manufacture of materials and structures of molecular dimensions.Next level of ultimate precision and miniaturization.Provides tools to manipulate matter at the atomic scale.the different classifications of nanotechnology are Wet nanotechnology ,Dry nanotechnology ,Computational nanotechnology.