giga-

- prefix one thousand million, or 10
^{9}.

- A metric prefix representing 10
^{9}, which is__equal__to a__billion__. For instance, 1__gigahertz__is equal to 10^{9}Hz. When referring to binary quantities, such bits and bytes, it is equal to 2^{30}, or 1,073,741,824, although this is frequently rounded to a billion. To avoid any confusion, the prefix glbi- may be used when dealing with binary quantities. Its abbreviation is G.

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