The base two number system, also known as binary, is perhaps the second most important number system in the modern era after decimal. All computers effectively "run" in binary. Any number can be represented in binary; binary digits can only be 0 or 1. In some interpretations, binary numbers can be thought of as a series of switches or True/False statement. All data storage and operations are done in binary. In computing, a single binary digit is called a bit; 8 bits is called a byte. A gigabyte is either 1000^3 bytes or 1024^3 bytes, depending on what measurement system you are using. 00001000 in binary is 8 in decimal, expressed as one byte of data. I could go on, but I won't.