About two hundred years before, the word 'computer' started to appear
in the dictionary. Some people even didn't know what is a computer.
However, most of the people today not just knowing what is a computer, but
understand how to use a computer.
Therefore, computer become more and more popular and important to our
society. We can use computer everywhere and they are very useful and
helpful to our life. The speed and accuracy of computer made people felt
confident and reliable. Therefore, many important information or data are
saved in the computer. Such as your diary, the financ…
