 This is the definition recommended by the International Electrotechnical Commission (IEC).This definition, and the related definitions of the prefixes mega (), giga (), etc., are most commonly used for data transfer rates
in computer networks, internal bus, hard drive and flash media transfer speeds, and for the capacities of most storage media, particularly hard drives, flash-based storage, and DVDs.It is also consistent with the other uses of the SI prefixes in computing, such as CPU clock speeds or measures of performance.