¹Note that bit is the unit of amount of information. Our modern culture has vulgarized the bit and its multiples, the Byte, KiloByte, MegaByte, GigaByte and so on as simple measures of the amount of RAM memory and capacity of a hard drive in a computer. In that sense, a confusion is created between the encoding of a piece of data and its actual amount of information. For example a file composed of one million letters will take one million bytes in a hard disk, but it does not necessarily have one million bytes of information, since in many cases parts of the file can be predicted from others. This is the reason why data compression can manage to compact files.