| backup (Sometimes "back up" when used as a verb) A spare copy of a file, file system or other resource for use in the event of failure or loss of the original. The term is most commonly used to refer to a copy of all the files on a computer's which is made periodically and kept on or other removable medium (also called a ""). This essential precaution is neglected by most new computer users until the first time they experience a or accidentally delete the only copy of the file they have been working on for the last six months. Ideally the backup copies should be kept at a different site or in a fire safe since, though your hardware may be insured against fire, the data on it is almost certainly neither insured nor easily replaced. See also . Compare . (1998-04-17) |
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