The information in coded form in which it can use the computer is called data. And how many of the information can be encoded using two digits? Quite a bit, for example, by the numbers "0" or "1" can be coded status lights. If the lamp is lit, its state is described by the number "1". When the light is off, its state can be encoded by zero. Hence, one figure describes the status of a bulb. Storage unit such simple information, which can take only two values, called "bits". To describe the state needed a bit of light bulbs information.

But to describe more complex information than the state of one light bulb, not one bit. The most commonly used unit of information called "bytes." In a byte contains eight bits, and with a single byte You can describe the state has eight lights. With the help of bytes can be encoded with any sign, that is, a letter, number or punctuation mark. Modern computers are working with large volumes of information, and often use other unit of description of her. Kilobyte is 1024 bytes. Instead of "kilobyte" is often abbreviated to write KB.

With one kilobyte is possible to encode a full page of text. Megabyte, or MB cut, called 1024 kilobytes. Megabytes is enough to encode a simple photo. But the movie needed to encode hundreds or even thousands of megabytes. The computer stores and processes megabytes of information. For information processing in the computer is CPU – the main part of any computer.