Ext.
|
Description
|
Used by
|
###
|
Temporary file
|
program-dependent format
|
#24
|
Printer data file for 24 pin matrix printer
|
LocoScript
|
#IB
|
Printer data file
|
LocoScript
|
#nn
|
Part of file image
|
Long
|
#SC
|
Printer data file
|
LocoScript
|
#ST
|
Standard mode printer definitions
|
LocoScript
|
$$$
|
OS/2 archive file (i.e. archives.$$$, keys.$$$)
|
OS/2
|
$$$
|
Temporary file
|
|
$?
|
ZX Spectrum file in HOBETA format
|
|
$00
|
Pipe file
|
DOS
|
$DB
|
Temporary file
|
dBASE IV
|
$ED
|
Editor temporary file
|
MS C
|
$O1
|
Pipe file
|
DOS
|
$VM
|
Virtual manager temporary file
|
Windows 3.x
|
)2(
|
LHA archiver temporary file
|
LHA
|
??$
|
Backup file
|
P-CAD
|
??_
|
Microsoft packed file
|
Expand
|
?DK
|
Disk image
|
Loaddskf.exe
|
?UT
|
Nonpacked FTN mail (? - flavor)
|
FTN software
|
!ut
|
Unfinished µTorrent download
|
µTorrent
|
___
|
Adinf table
|
Adinf
|
EX_
|
Compressed executable file
|
Note: EX could be any first two characters in a file extension (e.g. BM_ for compressed bitmap (BMP), DL_ for compressed library, etc.) Files compressed using this method have been in use on Microsoft software CDs and floppies since around 1995.
|
?Q?
|
Squeeze for CP/M and MS-DOS
|
|
~$~
|
Temporary file
|
1st Reader
|
~??
|
Old Backup files (.MNU to .~MN)
|
Resource Workshop - Borland Delphi
|
~H
|
Cardfile heap
|
AZZ Cardfile
|
μ
|
Metrowerks Codewarrior project
|
|
Π
|
THINK C project
|
|
@@1, @@2, etc.
|
Hidownload temporary file
|
Hidownload
|
Ext.
|
Description
|
Used by
|
0
|
Compressed harddisk data
|
DoubleSpace
|
0B
|
Printer font with lineDraw extended character set
|
PageMaker
|
1337
|
Kiwi's RTCoD File Format
|
Se7ensins & Teh1337
|
001, 002, ...
|
Split parts of a single whole file
|
HJSplit, JJSplit, split (Unix) (when using numeric suffixes)
|
1
|
Fax
|
|
1
|
Fax
|
many
|
1
|
Roff/nroff/troff/groff source for manual page
|
cawf2.zip
|
123
|
Spreadsheet
|
Lotus 1-2-3 version 9 - Lotus 1-2-3 version 97
|
15U
|
Printer font with PI font set
|
PageMaker
|
1ST
|
Usually README.1ST text file
|
|
2GR
|
286 Grabber File
|
Win
|
301
|
Fax
|
Super FAX 2000 - Fax-Mail 96
|
386
|
Intel 80386 processor driver
|
Windows 3.x
|
386
|
Windows virtual device driver
|
Win
|
3DMF
|
QuickDraw 3D Metafile
|
QuickDraw
|
3DS
|
3D Studio Graphics format
|
3D Studio
|
3DT
|
Database in which the meta-data of a 3D Topicscape is held
|
3D Topicscape
|
3DV
|
3-D wireframe graphics by Oscar Garcia
|
3dv wireframe viewer
|
3FX
|
Effect
|
CorelChart
|
3GR
|
386 Grabber File
|
Win
|
3GP
|
Mobile Phone Video
|
|
3T4
|
Binary file converter to ASCII
|
Util3
|
4C$
|
Datafile
|
4Cast/2
|
4MD
|
Musical file
|
|
4SW
|
4DOS Swap File
|
4DOS
|
4TH
|
FORTH source code file
|
ForthCMP - LMI Forth
|
555
|
16 bit per pixel image file format (5bit per component)
|
Sierra Entertainment
|
668
|
Music (the mixing is always at 12048 Hz)
|
|
669
|
Music (8 channels)
|
The 669 Composer
|
6CM
|
Music (6 Channel Module)
|
Triton FastTracker
|
75
|
75x75 dpi display font
|
Ventura Publisher
|
7z
|
7-Zipped file
|
|
8
|
A86 assembler source code file
|
|
85
|
85x85 dpi display font
|
Ventura Publisher
|
8BF
|
Adobe Photoshop compatibile filters/plugins
|
|
8CM
|
Music (8 Channel Module)
|
Triton FastTracker
|
8M
|
Printer font with Math 8 extended character set
|
PageMaker
|
8U
|
Printer font with Roman 8 extended character set
|
PageMaker
|
83p
|
Executable program for TI-83 Plus Graphing Calculator
|
TI Connect
|
89p
|
Executable program for TI-89/89 Titanium Graphing Calculator
|
TI Connect
|
8xp
|
Executable program for TI-83/84 Plus Graphing Calculator
|
TI Connect
|
91
|
91x91 dpi display font
|
Ventura Publisher
|
96
|
96x96 dpi display font
|
Ventura Publisher
|
