Computer
Computer is one of useful invents.Almost every famliy has a computer.It is made up by CPU ,monitor ,keyboard and mouse.
With a computer,you can do something easily .It takes less time to find out a fact .If your memory is not very good ,I advise you to write a note of your daily activities on the computer .It can also draw pictures,chat online and surf the internet.
The computer industry developed rapidly.It's becoming more and more important in our life.