Units of computer storage or memory equal to one billion bytes, commonly used to measure the size of files, programs, or the capacity of hard drives.
Combines 'giga-' (one billion) with 'byte,' a unit of computer memory consisting of eight bits. This measurement became standard in computing during the 1990s as personal computers needed larger storage capacities.
A gigabyte is deceptive in practice—your '100 GB' hard drive actually holds about 93 GB because the way manufacturers count (1,000 instead of 1,024) differs from how computers actually work!
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