老师：Hey everyone. Today we're going to talk about something related to the internet. First of all, let's see, Mister Tan, who is an it teacher, he is giving a brief introduction to the internet. Let us try to learn more about the history and the development of the internet. Okay, now let's listen to his talk and try to answer the following questions. Before we listen, please bear all these four questions in your mind. Question number one, what does Mister Tan mainly talk about in his introduction to the internet? Number two, how many computers were connected in the beginning? Number three, what data scientists around the world originally use the internet? As the last one, what did a team banners Lee teach others to do. Now let's listen to his talk.
学生：Page 36, Integrated Skills Part A good morning class. Today I'm going to talk about the internet. I'm sure all of you use the internet, but what do you know about it? Now let me tell you about its history and development. The first general purpose computers came onto the market in the early 1950s, but it was only in 1969 that scientists invented a way for computers to communicate with each other. This meant that computers allowed people to pass messages along a network and talk to each other. To start with, only four computers were connected, and the network was for military use.
学生：Public commercial use of the internet began in mid 1989. One of the main applications of the internet is the worldwide web. Pages on the worldwide web are called websites and can be accessed through the internet. They were originally used as a space for scientists around the world to share information. The world's first website was built in 1990 by Tim Berners Lee, a British scientist. He then taught others how to build their own websites, allowing the internet to grow. Within 24 years, there were more than 1 billion websites online. Two years later, in 2016,3.6 billion people were using the internet, about 48% of the world's population at the time. And increasingly, people are using their phones to access the internet. The future is definitely online and it's definitely mobile.
老师：Okay, according to Mister Tan's talk, we can see that Mister Tan mainly talks about the history and development of the internet. And in the very beginning, there were only four computers connected. And also the scientists around the world originally use the internet as a space to share information. Also team banners, Lee taught others to create their own websites. Then we're going to complete the timeline below.
老师：Actually in the early 1950s, the first general purpose computers came onto the market. In 1969, computers allowed people to pass messages along a network. And also in mid 1989, public commercial use of the internet began. In 1
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