answer: #Person2# tells #Person1# the first computer was built in 1944 and it was larger and slower than the computer we use now.
documents: #Person1#: When was the first computer built?
  #Person2#: It was built in 1944.
  #Person1#: Is it the same as the computers that we use now?
  #Person2#: No, it was as large as a room and worked very slow.
  #Person1#: But computers have become smaller, and worked faster now.
  #Person2#: Yes. Most computers are as small as a TV set. Some can be made smaller than a book.
  #Person1#: Why is a computer so useful?
  #Person2#: It can keep much information and work very fast.
  #Person1#: Then they can do a lot of work for us.
  #Person2#: You are right. They have greatly changed our lives.