In computing, “.bak” is a filename extension commonly used to signify a backup copy of a file.
When a program is about to overwrite an existing file (for example, when the user saves the document they are working on), the program may first make a copy of the existing file, with .bak appended to the filename.
This common .bak naming scheme makes it possible to retrieve the original contents of the file.
In a similar manner, a user may also manually make a copy of the file before the change and append .bak to the filename.
Other naming schemes are also in widespread use: file~, file.orig, and file.old.
Database Applications like FoxPro and SQL Server use .bak files to back up their databases and other applications, like XML shell, create .bak files in their autosave process.[1]
They do not get automatically deleted, so they need to be manually deleted after the process using it is stopped.
Example applications using .bak files[edit]
This is a partial list of applications that generate .bak files (in some cases as an optional configuration setting):
Apophysis7X
Alteryx
Aspell
Audacity
AutoCAD
fluidsim
Blue Griffon
Captivate
Cubase
DraftSight
DrRacket
Exiled Kingdoms rpg
Family Tree Maker
Finale Notepad
FoxPro
FormZ
Google Chrome
Grand Theft Auto V
HxD
HyperCam
JavaFX Scene Builder
Lazarus
LMMS
MATLAB
Minitab
Mupen64
Notepad++
NUPS
Opera
Outlook Express
Password Safe (.ibak)
Photoshop
PScad
Free Pascal
Rhinoceros 3D
Sony Vegas
SQL Server
SCIA Engineer
Steinberg Cubase
Starbound
TeamViewer Manager
Terraria
Texmaker
TextCrawler
Turing
Turbo C++
UltraEdit
VEE
Windows (BOOTSECT.BAK)
WinMerge
Word
Zmodeler
OpenMPT
External links[edit]
BAK file
BAK or BK File Format
FoxPro Commands That Create Backup (.BAK & .TBK) Files
References[edit]
^ “What Is a BAK File?”. www.wisegeek.com. M. Haskins. Retrieved 12 March 2013.
en.wikipedia.org /wiki/Bak_file
Bak file
Contributors to Wikimedia projects2-3 minutes
12/18/2008
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