Ext.
|
Description
|
Used by
|
U3D
|
Model file format
|
Ultimate 3D
|
U3D
|
Universal 3D
|
Adobe Acrobat
|
U8
|
Sample
|
|
UB
|
Raw Unsigned Byte (8bit) data
|
AWAVE
|
UC2
|
Archive
|
UC II
|
UCN
|
New archive
|
UC II
|
UCS
|
Unknownsoft Service Pack (mainly for Shadow OS 2009)
|
Unknownsoft Computer Systems
|
UDF
|
Filter
|
Aldus Photostyler
|
UDO
|
Data
|
Moray User Defined Object
|
UDIWWW
|
bookmark data
|
UdiWWW
|
UDW
|
Raw Unsigned DWord data
|
AWAVE
|
UE2
|
Encrypted archive
|
UC II
|
UFI
|
data
|
UFO CaptureV2 settings -
|
UFO
|
graphic file
|
Ulead Photo Impact
|
UHA
|
UHarc archive
|
|
UHS
|
Universal Hint System (binary file)
|
|
UI
|
Espire source code file
|
Geoworks UI Compiler Geos
|
UI
|
Qt Designer's UI File
|
Trolltech Qt Designer
|
UI
|
User interface
|
Sprint
|
UIF
|
Long prompts for windows
|
WordPerfect for Win
|
UIH
|
Espire header file
|
Geoworks UI Compiler Geos
|
UL
|
ULAW audio file
|
|
ULD
|
Information about uploaded files
|
Procomm Plus - Datastorm Technologies, Inc.
|
ULF
|
data
|
MRF Mapping Tool Kit Universal List Format
|
ULT
|
Music
|
UltraTracker
|
UMB
|
Backup file
|
MemMaker
|
UNF
|
Universal NES Image Interchange File Format
|
|
UNI
|
Datafile
|
Forecast Pro
|
UNI
|
Music format
|
UNIMOD - MIKMOD
|
UNIF
|
Universal NES Image Interchange File Format
|
|
UNV
|
Text file containing finite elements nodal coordinates and more. See notes
|
Originally used by SDRC for its I-deas software, a lot of simulation software use it today.
|
UNX
|
Text file containing UNIX specific info
|
|
UOML
|
UniqueObject Markup Language (UOML) is a XML-based markup language
|
|
UOP
|
Uniform Office Format presentation
|
|
UOS
|
Uniform Office Format spreadsheet
|
|
UOT
|
Uniform Office Format text
|
|
UPD
|
Update data
|
dBASE
|
UPO
|
Compiled update data
|
dBASE
|
URL
|
Internet Shortcut (URL)
|
Windows Explorer
|
URT
|
Utah Raster Toolkit
|
|
USE
|
Log file
|
|
USP
|
Printer font with USASCII extended character set
|
Adobe PageMaker
|
USR
|
User database file
|
Procomm Plus - Turbo C++ tour
|
UT!
|
datafile
|
uTorrent
|
UTZ
|
Mobile Phone Theme
|
Sony Ericsson
|
UU
|
Encoded file (ASCII)
|
UUENCODE/UUDECODE - Uuencoding
|
UUE
|
Encoded file (ASCII)
|
UUENCODE/UUDECODE - Uuencoding
|
UW
|
Raw Unsigned Word 16bit data
|
AWAVE
|
UWF
|
UltraTracker WaveSample
|
UltraTracker
|
