Humans are the most intelligent among all the living beings in the world. At least we, the humans think so. From the initiation of our civilization, we have been developing numerous instruments. These instruments were used in daily life and as well as for the servival. We never stoped and kept dveloping the old ones and inventing new ones. With the development of instruments we build devices. And complicated devices formed machines. We had been trying to develop such system that not only be used to accomplishe tasks but also help us to do much more complicated job for human. Thus machines evolved. Still we are not satisfied. We are now trying mak to make the machines as intelligent as ours. We cannot feed organic brains to the machines. But still we are on the way of make them intelligent with logical reasoning, mathematical calculation, sensing environment with various input devices and various complicaed algorithms. The intelligence, thus building up in the machines is known as Artificial Intelligence.
