What was the first computer like?

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