求 The disadvantages or advantages of computer

As the technology keeps developing,computers have become a necessary tool in offices and schools.
But,as saying goes,every coin has two sides,it does have some disadvatages.
First,it may make people addicted to its interesting games,even forget to eat or sleep.Second,when we use a computer,it does harm to our eyes.Third,for students,it do no good to,especially who less self-control.