The internet was first built up in 1960s, when computers were huge and expensive and network was uneasy to operate. The whole network will stop working if one computer in it was broken.
At the beginning the internet was used only by the government. In the early 1970s, some universities, hospitals and banks were also allowed to use it.
In the beginning of 1990s, the computers became cheaper and easier to operate. Now using the internet is very convinient.
It is said that the number of people using the internet is more than several millions every single day, and sending an Email is also becoming popular. The internet has become a very important part of many people's lives.

罹烟的质量认证：人工翻译