(i) Robotics is an integrated study of mechanical engineering, electronic engineering, computer engineering, and science.
(ii) Robot is a mechanical device designed with electronic circuitry and programmed to perform a specific task.
(iii) These automated machines are highly Significant in this robotic era where they can take up the role of humans in certain dangerous environments that are hazardous to people like defusing bombs, finding survivors in unstable ruins, and exploring mines and shipwrecks.

(i) Face recognition.
(ii) Providing response to player's actions in computer games.
(iii) Taking decisions based on previous actions.
(iv) To regulate the traffic by analyzing the density of traffic on roads.
(v) Translate words from one language to another.

There are two ways of preparing the nanomateials, top down and bottom up approaches

(i) Particle physics deals with the theory of fundamental particles of nature and it is one of the active research areas in physics.
(ii) Initially it was thought that atom is the fundamental entity of matter.
(iii) In 1930s and it was established that atoms are made up of electrons, protons and neutrons.

(i) Nano-robots in blood stream to perform small surgical procedures, to fight against bacteria, repairing individual cell in the body.
(ii) It can travel into the body and once after the job is performed it can find its way out. Chinese scientists have created the world's first autonomous DNA robots to combat cancer tumours.