computer backup
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| Noun | 1. | computer backup - (computer science) a copy of a file or directory on a separate storage device; "he made a backup in case the original was accidentally damaged or erased"duplication, duplicate - a copy that corresponds to an original exactly; "he made a duplicate for the files" computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures |
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computer backup - (computer science) a copy of a file or directory on a separate storage device; "he made a backup in case the original was accidentally damaged or erased"