backup

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backup

[′bak‚əp]
(building construction)
That part of a masonry wall behind the exterior facing.
(civil engineering)
Overflow in a drain or piping system, due to stoppage.
(computer science)
Logical or physical facilities to aid the process of restarting a computer system and recovering the information in it following a failure.
The provision of such facilities.
(engineering)
An item under development intended to perform the same general functions that another item also under development performs.
A compressible material used behind a sealant to reduce its depth and to support the sealant against sag or indentation.
(graphic arts)
An image printed on the reverse side of a printed sheet.
The printing of such an image.
(metallurgy)
A support used to balance the upsetting force in the workpieces during flash welding.
(petroleum engineering)
During drilling, the holding of one section of pipe while another is screwed out of it or into it.

backup

1. That part of a masonry wall behind the exterior facing.
2. A compressible material used behind a sealant to reduce its depth and to support the sealant against sag or indentation.
3. Overflow in a drain or piping system, due to stoppage.
4. A condition where waste water flows back into another fixture or compartment or water line (but does not flow back into the potable water system).

backup

(operating system)
("back up" when used as a verb) A spare copy of a file, file system, or other resource for use in the event of failure or loss of the original.

The term commonly refers to a copy of the files on a computer's disks, made periodically and kept on magnetic tape or other removable medium (also called a "dump").

This essential precaution is neglected by most new computer users until the first time they experience a disk crash or accidentally delete the only copy of the file they have been working on for the last six months. Ideally the backup copies should be kept at a different site or in a fire safe since, though your hardware may be insured against fire, the data on it is almost certainly neither insured nor easily replaced.

See also backup software, differential backup, incremental backup, full backup. Compare archive, source code management.

backup

(1) A duplicate copy of data or of an entire storage drive on a separate storage medium. "Backup" is the noun; "back up" 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.
References in periodicals archive ?
The unique sloped shape of the APC Back-UPS Pro offers easy access to a newly created seven outlet design that can accommodate additional peripherals.
The Back-UPS RS 1300 and 1500 LCD will be introduced in North America in January 2007 and carry estimated resale prices of $199 and $249, respectively.
APC's new Back-UPS ES 750 is currently available in North America and carries an estimated resale price of $99.
The Back-UPS RS comes equipped with USB (Universal Serial Bus) connectivity and includes APC's PowerChute Personal Edition software, which is easy-to-use, safe system shutdown software with sophisticated power management functions for use with Windows (XP, ME and 98) and Macintosh OSX operating systems.
The Back-UPS ES 350 and 500 models are available at EUR145 and EUR157 respectively.
While a typical UPS provides run times of less than an hour, depending on the UPS and connected devices, the APC Back-UPS Connect BGE70 powers small loads such as modems, routers and VoIP phones for approximately three and a half hours during a power outage.
In Europe, Personal Computer World UK reviewed APC's Back-UPS RS product for home users, giving it a "Recommended" rating.
DiskSafe Express features scheduled back-ups that can be set weekly or daily.
Lombard and freshman Chase Moline will serve as back-ups.
APC's Back-UPS HS 500 was named to TechLiving's "2004 Hot List" of 50 products that will simplify your life.
Specifically, the Back-UPS RS 800 and the Back-UPS ES 725 earned this coveted distinction.