gigabyte

computer science

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July 21, 2026

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A gigabyte (GB) is a unit of digital information storage. It is commonly understood as one billion bytes, but in computer science, it can also refer to 1,073,741,824 bytes, which is 1024 megabytes. A byte is the fundamental unit of information in computing, typically consisting of 8 binary digits (bits). Bytes are the smallest operable units of storage, and they can represent characters or numbers. While SI prefixes (powers of 1000) are often used, computer systems historically used binary prefixes (powers of 1024), leading to slight variations in measurement. The term "gigabyte" was first used in 1975.123

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byte
…hardware are usually given in gigabytes (GB; one billion bytes) and terabytes (TB; one trillion bytes). Because the byte had its roots in binary digits, originally one kilobyte was not 1,000 bytes but 1,024 bytes (1,024 = 2¹⁰), and thus one megabyte (MB) was 1,024 × 1,024 bytes and so…
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…hardware are usually given in gigabytes (GB; one billion bytes) and terabytes (TB; one trillion bytes). Because the byte had its roots in binary digits, originally one kilobyte was not 1,000 bytes but 1,024 bytes (1,024 = 2¹⁰), and thus one megabyte (MB) was 1,024 × 1,024 bytes and so…
Read More