writing paragraph by example.

Computer has three main functions that very useful in our lifes. First, it can be used as a medium in bussiness. For example, people use computer to calculate what the customers buy in any department store. People also use computer for typing in many offices. Not only that, some people rent their computer for typing or browsing internet, that we call it as 'warnet'. Second, computer can help in studiying. For instance, students can use it to make any papers for their assignment. Student also can use it for searching material of lesson, exactly with addition the internet connection. For teacher, it is often used as a medium for teaching to students. Third, computer also can be used for consolation. For example, we can chat with any social messaging application in our computer, like : Facebook, Twitter, Myspace, YM, Koprol, etc. Then, we can play any games in computer too.
Not only that, we can also play musics or videos in any media players, like : Winamp, Windows media player, Music match jukebox, etc. So, we can conclude that computer is very useful and important. Because it has some main function that help us in our daily lifes.