The web is made up of millions of documents called web pages.These pages are held in computers all over the world.Many people have a favourite website with a number of web pages on the same subject. It took 50 years for 100 million people to listen to the radio.It took 15 years for 100 million people to watch television.By the year 2000，it had taken only about three years for 100 million people to use the Internet.What will happen next on the Internet?