Some recent developments in computer industry make scientists predict that the gap between human beings and the machine will be closed by the year B0000. To understand the significance of this prediction,let us compare the human brain with existing computers.The brain consumes electrical energy at the rate of BE watts and occupies volume of one tenth of a cubic foot.The brain houses between A0 billion and A00 billion items of information.Every brain cell is directly connected to many other cells.As a result,the cells in which information is stored can communicate with thousands of other cells. In contrast the computer consumes A000,000 watts of electrical power and occupies hundreds of cubic feet of space.The computer memory is like a cell of pigeonholes, with no thinking capacity and no connections elsewhere. In a word,the electronic brains can hopelessly succeed in comparison with the human brains.