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The Internet, sometimes called simply "the Net," is a worldwide system of computer networks - a network of networks in which users at any one computer can, if they have permission, get information from any other computer (and sometimes talk directly to users at other computers). Internet is very important for our life, so we must have more attention on using internet, because using internet not only have a good uses, but also a bad uses like hijacking a system, sending virus, and watching porn video.

Hacker is someone who smart in programming, and damage is the work that they like. they usually try to penetrate any defense of a system just for fun or without any serious purpose. Sometimes their goal is to become famous, and then the government concerned with their skills and the government interested to recruit them to become experts in the government. Not all of hacker is bad, many of them hacking to represents the people's awareness to an error in the government.

Virus is program that can harm computer and spread through Internet. Our system can harmed by computer only in a second and the virus also can spread to the world via the Internet just in a second. We must protect our computer or system with anti-virus, and update the anti-virus everytime. Sometimes hacker make a virus that only can detect and delete just with one anti-virus, and the anti-virus just can made only by him.

Porn movies can access at any time and by anyone, including children and can damage the personality of children. Porn movies is free in internet, children can download and keep them in their handphone or computer. Porn movie can make children become curious to try it. Damage to their mental, because such matters should they get naturally when they mature. That is why today many children under the age already pregnant by their boyfriend.

Hijacking, sending virus, porn video is a small example of bad uses of internet. There is...