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.