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A Useful Invention

          The twentieth century has been a century of great inventions.The best and the most useful of them is the computer. Take any field of life, you will find the application of computer there. The best products of computer  are E-mail and Internet.
           E-mail, in fact, is the electronic mail. It is a message or information sent from one computer to the other with the help of Internet. A person who uses a computer can get an E-mail address by signing up an E-mail account. E-mail facility is used by individuals and the businessmen alike. Internet connects people in different parts of the world.
           The E-mail goes from the sender's computer through a modem. It is a device thar changes computer date to electric signals that can travel over telephone lines. A modem at the receiving computer translates the telephone signals back into the computer date.
           Every computer user can receive his E-mail messages by opening his inbox. To read the messages the user opens the file from the inbox. It is very easy to copy and send E-mail messages to several addresses. You can make large mailing list of the electronic address of your friends. You can send an E-mail to one or many at the same time. You can also send pictures and photographs through E-mail.
           Internet is a common word these days. With is help you can search sources ranging from vast database to small electronic "bulletin boards" where you can form discussion groups on common interests. In 1960 Internet was used for keeping military database in the USA. Later on many universities and institutions developed their own computer networks.

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