What if computers doesn’t exist? We might calculate for tax by hand or abacus, so there are many errors in calculating, and it takes long time to do that. It is hard to make fancy scenes in movies. Like these, computers are important in our life, so I write why computers are the greatest invention. First, computers can calculate, save, load, delete, copy amount of data easily and quickly. It can copy hundreds of books in few seconds and can process a lot of paperwork in one hour without hand. Especially, it is impossible to simulate typhoon in time without computer. Second, computers help graphic realizations. In SF movies, we can see brilliant scenes by means of computers, even computers help MRI in the medical industry. Last, computers make us use internet. There are no mechanical devices to exchange amount of information in real time. How can do telegraph? How can do telephone? Somebody may say “Smartphone can be use internet.”, but it’s kind of computers. So computers are only device to use internet.
conclusion- I think computers are greatest invention of 20th century
