Bak file

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 he or she is 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, file.old, and so on.

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. They don't get automatically deleted, so they need to be manually deleted after the process using it is stopped.

Example applications using .bak files

This is a partial list of applications that generate .bak files (in some cases as an optional configuration setting):

Bąk railway station

Bąk is a PKP railway station in Bąk (Pomeranian Voivodeship), Poland.

Lines crossing the station

References

Coordinates: 53°57′N 18°02′E / 53.950°N 18.033°E / 53.950; 18.033

Bak (instrument)

Bak (hangul: 박; hanja: 拍) is a wooden clapper used in Korean court and ritual music. The person playing the bak is called jipbak; he serves as conductor or musical supervisor for the group. Bak is arranged from 6 pieces of wooden sticks tied together and creates the clapping sound if clapped to indicate the beginning of music plays.

References

See also

Bäk, Khost Province

Bäk is a village in Khost Province, Afghanistan and the center of the boundary Bak District, close to the border with Pakistan. It is located on 33°30′N 70°03′E / 33.5°N 70.05°E / 33.5; 70.05 at 1137 m altitude.

Glossary of chess

This page explains commonly used terms in chess in alphabetical order. Some of these have their own pages, like fork and pin. For a list of unorthodox chess pieces, see Fairy chess piece; for a list of terms specific to chess problems, see Glossary of chess problems; for a list of chess-related games, see Chess variants.

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

[adjective: prophylactic] Prophylactic techniques include the blockade, overprotection, and the mysterious rook move.

Q

R

S

T

U

V

W

X

Z

References

Bibliography

File (formation)

A file is a military term for a number of troops drawn up in line ahead, i.e. one behind the other in a column. The number of files is the measure of the width of a formation of troops in several ranks one behind the other.

Usage

Files are useful when troops don't know where the enemy is, since there are overlapping fields of fire from each soldier, and cover from a possible flanking attack. Files are at a disadvantage when there are heavy weapons nearby, supported by infantry, especially machine guns and tanks.

Ancient Greek use

A file of men in the Greek phalanx was called a lochos (Greek: λόχος) and usually ranged from eight to sixteen men.

References

Bibliography

File (tool)

A file is a metalworking, woodworking and plastic working tool used to cut fine amounts of material from a work piece. It most commonly refers to the hand tool style, which takes the form of a steel bar with a case hardened surface and a series of sharp, parallel teeth. Most files have a narrow, pointed tang at one end to which a handle can be fitted.

A similar tool is the rasp. This is an older form, with simpler teeth. As they have larger clearance between teeth, these are usually used on softer, non-metallic materials.

Related tools have been developed with abrasive surfaces, such as diamond abrasives or silicon carbide. Because of their similar form and function, these have also been termed 'files'.

History

Early filing or rasping (the distinction is emic, not etic) has prehistoric roots and grew naturally out of the blending of the twin inspirations of cutting with stone cutting tools (such as hand axes) and abrading using natural abrasives, such as well-suited types of stone (for example, sandstone). Relatedly, lapping is also quite ancient, with wood and beach sand offering a natural pair of lap and lapping compound. The Disston authors state, "To abrade, or file, ancient man used sand, grit, coral, bone, fish skin, and gritty woods,—also stone of varying hardness in connection with sand and water."