A Computer

I think a computer is most important invention in modern times. Because it counts exceedingly fast and has enormous storage capacity for information, it plays a very important role in our modern life. At present, the plans are controlled by a computer. Moreover, a computer is indispensable for making robot. Furthermore a computer is used for correcting exam sheets. In addition, according to the news reportedly, the computer is also has the function of auto call the muster system, and the student not dare to skip the class. Because the efficiency of a computer is so amazing, we can surely say that we can not do without it in our life.