In modern sociey,people who is handicaped in using computer and accessing network are classified as "blinds" naturally.The advantages of captioned facility is significant,the world move much faster than before because of the information exchange and speedy processing of data.You can guess how much business can grow if a spreadsheet need to be calculated using three days instead of one second nowaday,I should say in majority that computers and networking bring much convenience to human life.But there are still dark side of the world.I also observe children that cannot do simple calculation by mind,they have to rely on calculators,a simple form of computer,similar things happen all around us and when time goes by,we are weak in mind manipulation yet also weak in physical because we spent all time around the computer.What a world we are in to say hello to a friend next door by send him email