Gigabyte

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A gigabyte (GB or, informally, gig) is an unit of measurement in computers and similar electronic devices. At first it meant 1,073,741,824 (230) bytes. Now some people say a gigabyte is exactly 1 billion bytes, and gibibyte is a better name for 1,073,741,824 bytes. In everyday use, most people still use gigabyte to mean 1,073,741,824 bytes, especially when talking about computer memory.

This measurement is often used when measuring the capacity of computer memory, hard drives, or other storage devices.