Since 1946,computers have changed our lives and our ideas.
The first computer was built at Harvard University in 1946.It was as large as a room and quite difficult and slow to operate.But since then,computers have become smaller,easier to use and to operate.Some computers can be made smaller than a book.
Why is the computer useful to us?First,it can store a lot of information.Second,a computer can work very quickly--thousands of times faster than human and it won’t be tired.Third,modern computers can be built into other kinds of machines,like radios,cars and planes.They can do a lot of work for us.
Soon,everyone,either at home or at work,will use some kinds of computers.The lives of all of us will be changed by this invention.