Cyborg, short for "cybernetic organism", is already part of our daily life. We see replacement human organs or tissues such as bionic arms and legs, teeth, lens, heart valves etc. We also see pacemakers and automatic biochemical pumps, etc. In addition, video "eyes" for blind are helping blind navigating in New York City subways. With deciphering human DNA code after human genome project, more and more artificial materials will be available to extend, replace the part or the whole human body.