Backup

To create a copy of data as a precaution against the loss or damage of the original data. Most users backup some of their files, and many computer networks utilize automatic backup software to make regular copies of some or all of the data on the network. Some backup systems use digital audio tape (DAT) as a storage medium.

The activity of copying files or databases so that they will be preserved in case of equipment failure or other catastrophe. Backups are often done as a routine business operation. The retrieval of backup files is called 'restoring' them.

A copy of a file, a set of files, or whole disk for safekeeping in case the original is lost or damaged.

A copy of information created as a precaution in case the original is lost or destroyed

A copy of files and programs made to facilitate recovery if necessary.

[A] copy of files and programs made to facilitate recovery, if necessary. [INFOSEC-99] 2. See backup file.