Computers play an important part in our lives. However, despite bringing certain advantages, this high-tech device also has its own limitations. First of all, a computer is a useful tool and a smart device in every aspect of life. Furthermore, new building materials, new robots and new fuels are all created with the help of information technology. That said, computers have made our lives more modern, convenient and civilized. However, computers also have their own disadvantages because users take advantage of it for negative purposes. Some people use computers to do nothing but play games, chat, spam, create dirty information online. In addition, sitting in front of the screen for many hours can lead to obesity, back pain, myopia. Besides, people who pay too much attention to online activities can become passive in real life because of lack of communication. In short, everything has its two sides, so does the computer. Therefore, it is essential that we use it for the right purpose.

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 English and so on...In a word, computer is the best device to everyone for many variety purposes.

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