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'''Backup''' is a process used essentially universally throughout computing: it involves making a copy (usually also called a 'backup') of newly-created data, so that should a [[hardware]] failure occur in the [[peripheral|device]] holding the data, it is not lost.

The backup may simply be a copy made on identical media to that holding the original (e.g. a [[disk]] pack), or it may be on another medium: for a long time, [[magnetic tape]] was used, since it had high capacity, but was fairly inexpensive.

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[[Category: Basics]]