A binary digit is known as a bit. A bit is the smallest unit of data a computer can use. The binary unit system is used to describe bigger numbers too.
Eight bits are known as a byte.
The binary unit system is as follows:
|8 bits||1 byte (B)|
|1,000 bytes (1,000 B)||1 kilobyte (KB)|
|1,000 kilobytes (1,000 KB)||1 megabyte (MB)|
|1,000 megabytes (1,000 MB)||1 gigabyte (GB)|
|1,000 gigabytes (1,000 GB)||1 terabyte (TB)|
|1,000 terabytes (1,000 TB)||1 petabyte (PB)|
When calculating storage space for disk drives, it is common to use multiples of 1,000. These are shown in the table above as kilobytes, megabytes etc.