Computers that change the world

In modern life, computers are gradually becoming popular all over the world. In my opinion, I think that computers are the most useful gadgets and make the world change because of some reasons:
First of all, computers help us communicate more easily with people through Internet. We can text, call video by webcam or send voice messages instead of sending mails through the post office. It will improve our relationship.
Second, computers help people communicate, they are also the things that help people entertain after stressful working hours. They contain funny videos, fun games, and you can also access the Internet to find interesting things too.
Last but not least, computers have many useful functions but the most convenient is to help us study. The computer contains a lot of information online that you can access and find out. You can also look up dictionaries, learn English and many other things.

That my opinion, what about you?