How to describe a computer in English

As time goes on,computer is playing an important role in our life.It is so powerful.
It usually has a keyboard,a mouse,a screen and a sound box.With the magic tool,we can chat with people all over the world,surf the internet,listen songs,watch movies,write articles,draw pictures and so on.because of its appearing,our life turned a lot.
but it has negative effect as well as positive effect.many people addict themselves to the computers,playing games or chat all day and forget their own job.they make the computers taking up their whole lifves.
in all,we should make best use of it,instead of addicting to.

a box with magic power.