Computers have become a vital part of everyday life. You can find them in business, science, medicine, and in schools, and perhaps even at home. Computer - an electronic machine that can be used to store, process and display the data. There are many types of computer, among them: the personal computer (or PC), which can be a desk with a computer case or desktop computer with the computer case, laptop (which is smaller than a desktop), laptop computer (which is like a laptop, but less) podportativny computer (which is even less) and a laptop computer, usually called palmtop. There is a running computer, which are found in other machines, such as refrigerators and cars, for example.