I was only nine years old when I learnt how to use a computer.My mother is my first teacher.I know how to type,how to copy a file,and how to visit a website on the Internet.One day,mom was not at home.I turned on the computer and began to learn how to chat on net.The first one I met there was a boy called Tom.He greeted me politely.When he knew that I was only a 9-year-old girl and almost knew nothing about chatting on net,he started showing me how to use the chatting tools,how to download,and how to send e-mails.I learnt a lot from him.