One is that the computer is useful, for example, it makes my life easier. I can search for information, book tickets, chat with my friends, send e-mails and so on by the computer. But the paper can be used to write something down or to print out the information, which helps me a lot.
Another one is that sometimes too many computers may make a power network system broken, causing power cut. While the paper doesn't have any influence on electricity and power, so it can also be applied to keep what has been written in case the computer loses power.
Then,我们再来说一说,它们的相似之处。
They have things in common, too. First, the computer and the paper can both be used to help people to receive education. We can take notes in a paper and we can do the research through computers, too.
Second, they can also record people's ideas and experiences. For example, an ordinary student will write down his new thoughts in a book while a famous writer will write a novel which records his life experiences and then be published on the paper.