Also found in: Dictionary, Thesaurus, Medical, Financial, Idioms.
Computing a file or set of files copied for security purposes
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
backup(1) A copy of data and software on external storage. "Backup," one word, is the noun; to "back up," two words, is the verb. See backup software, backup types, backup storage, copy data, backup and restore, disaster recovery and LAN-free backup.
(2) Additional hardware resources ready to take over if the main system fails. See fault tolerant.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.