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.
A duplicate of information as a preventative measure against the potential loss of data that is done regularly by many computer users. Many organizations also utilize automatic backup software that regularly stores data.
A copy of inactive data, intended for use in the restoration of data lost to catastrophic failure of system memory.