Backup
A backup was a copy of computer  that was used in the event that the original had been lost. A backup system could be used to restore said data.

In 2370, Major Kira Nerys was using a terminal in Deep Space 9's operations center. When the terminal self-destructed, Kira lost an evaluation report she had been working on for weeks. Even the backups were lost. ()

See also
EMH backup module

External link

Computer technology