Computers as a source of great entertainment and hours of boredom in the seizure. Computers are very sophisticated electronic devices. The first of these, which formed few years ago were very large and very weakly efficient. Until the current technique has evolved so much that designers first computers were not even able to imagine the appearance and performance of todays machines. Computers today have become very popular and can be found in almost every home. Of course, considering the third world countries, we cannot talk about so than is the case for example in Europe. Young people from an early age meet computers. Of course, the home for private use. For those computers that are used in large businesses are slightly different from these private, and of course meet a completely different role than those of our computers. Thanks to the computer can take the time instead of sitting idle and get bored, not to mention the fact that the computer gives us the opportunity to earn some money, which is never too little.