Giga


giga- (symbol: G) is a prefix in the SI system of units denoting 109, or 1,000,000,000 (1 billion). The Oxford English Dictionary reports the earliest use of giga- in this sense to be "1947 Compt. Rend. de la 14me Conf. (Internat. Union of Chem.) 115 The following prefixes to abbreviations for the names of units should be used..G giga- 109×." Giga- comes from the Greek γίγας, meaning giant.