The necessary and multi functional It is hard to imagine todays world without computers. Long ago ceased to be present only in equipment, laboratories and science centers, and got the vast majority of roof, especially in the most developed parts of the world. Has become a major tool in the workplace but also in everyday life, used not only for the performance of official duties, but also for entertainment (through games), science (with the help of various multimedia programs), or - when connected to the Internet - to communicate with loved ones or the adoption of new knowledge. Initially, the domestic leader led stationary computers, personal machine. Consisted of one monitor, keyboard, and the stations at which there are components and drives. Over time these computers have developed and characterized more and better technical data. Today, large and cumbersome desktop computers are slowly displaced by the laptops, which are characterized by the construction and size, which allows them to take with you to different places.