Nowadays, most of people know to use computer. But what purposes they use it for ?. that 's way we really recognize that it is so bad or good to use computer. You know, up to the ages, we classify the benefits of computer are. For people who work in big companies are required to know how to use computer for manage the project or only composing the contract, saving the database, even making a important data security for firm. In fact, A great benefit that a computer certainly work effectively and as replaced thousands of people to solve the complex tasks by only one person or group. That save much money and time and even worker's strength. And computer is the intelligent device for students to study, especially IT students. They can search documents which are related their curriculum or any information they are interested in their life on internet if that computer has global network. On the other hand, most of people are tired after sitting with computer for work a long time in day, may relax their mind with many kinds of games they want, listen to music, study