This was designed by the Israeli Scientists. It is world’s smallest computer and is so small that a million of them would fit in a drop of water but have the capacity to diagnose prostate cancer and release a drug to kill cancer cells. Although, the technology has only worked in a test tube but it could be another steps towards the dream of nano-technological medical machines that could be operative inside the living human body. It can also identify the first signs of a developing disease and deliver the right treatment, all before any symptoms appear.