A computer is one of the most useful inventions in people's lives nowadays. Almost everyone has a computer at his house or a working office.
There're a great variety of multifunctional programs where you can create, edit or save files in different file types. You can write your own programs for sure.
The main ability we have by using a computer is an available Internet access. It's the biggest mine of information in the whole world where you can literally find everything you are interested or confused in.
But there're also disadvantages. A lot of people spend their time with a computer more then 10 hours a day! It's harmful for man's health and especially vision.
Of course, a computer invenitng is a priceless event in the World's history and we can't imagine our lives without it.