American Heritage® Dictionary of the English Language, Fourth Edition
- One billion (109): gigahertz.
- 1,073,741,824 (230): gigabyte.
- From Ancient Greek γίγας (gigas, "giant"); cognate to giant. (Wiktionary)
- From Greek gigās, giant. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Connolly wrote to the collaboration members that the database at the Space Telescope Science Institute was only 100 gigabytes—“giga-” means “billion”—and a search took five hours.”
“Kilo-, mega-, giga- and tera- are prefixes used with bit or byte to measure capacities.”
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