What Is The Internet?

The Internet, also known as "the Net," is a worldwide system of computer networks in which users at any one computer can get data from any other computer. It was conceived by the Advanced Research Projects Agency (ARPA) of the U.S. government in 1969 and was first known as the ARPANET. The original aim was to create a network that would allow users of a computer at one university to be able to communicate with computers at other universities. A side benefit of ARPANET's design was that, because messages could be sent in more than one direction, the network could continue to function even if parts of it were destroyed in the event of a military attack or other disaster. Luckily, we've never had to test if it works.

Today, the Internet is self-sustaining and is used by hundreds of millions of people worldwide. For many Internet users, email has replaced the Post Office for short messages. You can also carry on live conversations with other computer users using Internet Chat. Currently, Internet telephone hardware and software allow real-time voice conversations (VOIP) including free long distance for voice calls between two computers.

The most widely used part of the Internet is the World Wide Web ("the Web") developed by Tim Berners-Lee. On most web sites, certain words or phrases appear in text of a different color than the rest and sometimes also underlined. When you point to one of these words or phrases by clicking the left button of your mouse, you will be transferred to the page that is associated with this word or phrase. These are called hyperlinks or links. Sometimes there are buttons, images, or portions of images that can be "clicked". If you move the pointer over a spot on a web site and the pointer changes into a hand,

this indicates that you can click it and be transferred to another site.

With the web, you have access to millions of pages of information. Web browsing is done with a web browser. Currently, the most popular web browsers are Microsoft Internet Explorer and Mozilla Firefox. Another excellent alternative is Opera. Depending on your connection speed, browsers can support such advanced features as animation, video, sound, and music.

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