1. Group B - 751151 - 751145

Gigabyte

The term gigabyte is commonly used to mean either 1000³ bytes or 1024³ bytes. The latter originated as compromise technical jargon for byte multiples that needed to be expressed by the powers of 2 but lacked a convenient name. As 1024 (2¹⁰) is approximately 1000 (10³), roughly corresponding to SI multiples, it was used for binary multiples as well.

Base 10 definition

1 GB = 1000000000 bytes (= 1000³ B = 10⁹ B) is the definition recommended by the International System of Units (SI) and the International Electrotechnical Commission (IEC). This definition is used in networking contexts and most storage media, particularly hard drives, Flash-based storage, and DVDs, and is also consistent with the other uses of the SI prefix in computing, such as CPU clock speeds or measures of performance. The Mac OS X file manager from version 10.6 and higher is a notable example of this usage in software. Since Snow Leopard, file sizes are reported in decimal units.