BAK has various meanings in the NASA category. Discover the full forms, definitions, and usage contexts of BAK in NASA.
Backup is the most important computer term you should know. A backup is a copy of one or more files created as an alternate in case the original data is lost or becomes unusable. For example, you may save several copies of a research paper on your hard drive as backup files incase you decide to use a previous revision. Better yet, you could save the backups to a USB flash disk, which would also protect the files if the hard drive failed.
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