‘Mater atrium necessities’ goes the Latin proverb i.e., Necessity is the mother of invention. But St.Augustine went a step further when he said ‘Necessities’ non habit lrhrm’ i.e. necessity knows no law. It just means that when a scientist feels that the human beings require a certain facility he tries to invent means to satisfy human need. He bypasses the existing social laws and conventions. Since the beginning of the world man has been inventing things for his safety, need, comfort and even for luxury.Man does not live for food, cloth and house. He has ambitious nature. He has human feelings for those who suffer. He wants to crush those who oppose him.These two special cravings of man are responsible for the noblest products and the most devastating things. Sober ideas necessitate man to communicate with others. He invented means of communication. Hundreds of years of toil exhausted the physical and mental faculties of man. He wanted things that could share his physical and mental pressures. Man is not a machine. He has feelings and emotions. Strained feeling and hurt emotions required recreation.