Gigabytes, Megabytes, and Kilobytes (GB, MB, KB)Up to Glossary
This Definition applies to: Any version.
These terms refer to the size of a given file.
A byte is a single unit of computer data. Since computers deal in large volumes of data we use a decimalized system of naming file sizes. A giga-byte (also called a gig) is 1 billion bytes, a mega-byte (also called a meg) is 1 million bytes, and a kilo-byte (sometimes simply called k) is 1000 bytes.
It is a good practice when writing for the web to state the type and size of a file if it is available for download. For example a document that is 138,000 bytes should be labelled as 138Kb and a file that is 1,451,216 bytes should be labelled 1.45 Mb.