Is a digital writing system that is based on number two, and uses only two symbols 1 and 0. this numbering system to give the possibility to represent all existing numbers by combinations of 0 and 1. applies in computing. Each of the binary digits, or bits, is represented by an electronic circuit that can only have two positions, one of which is on and the other off. Thus establishing a correspondence between electricity flowing through a computer and the number system that forms the basis of their language. The bits are included in larger groups called bytes. One byte comprises eight bits. There are larger units, which correspond to power base 2. these include the kilobyte, which equals 1,024 bytes, and the megabyte, equivalent to 1,024 kilobytes.
The 2 is the basis of the binary system. Any amount you want to represent is a power of two. For example, if you want to symbolize the number 8, will have to raise the 2 cubed, or in other words, multiply 2 by 2, and the result again by 2. If you would like to represent the 1, would have to raise the two to the power 0.