| Extension |
Meaning / Link |
| .U96 |
EasyZip
Temporary File |
| .UAP |
User Agent Wireless
Telephony Profile |
| .UB |
Audio File, Raw
Unsigned Byte (8-bit) Data |
| .UC2 |
Compressed File |
| .UCM |
Urban Chaos Game
File |
| .UCN |
Compressed Archive
|
| .UDF |
WindowsNT Uniqueness
Database File, Photostyler Image Filter |
| .UDL |
MS Data Link |
| .UDW |
Raw Unsigned
DoubleWord (32-bit) Data |
| .UE2 |
Encrypted Archive |
| .UFO |
Ulead Object File |
| .UG |
Drawing File
(various) |
| .UHS |
Universal Hint
System File |
| .UI |
User Interface,
Geoworks UI Compiler Espire Source |
| .UIF |
WordPerfect
Long Prompts |
| .UIH |
Geoworks UI Compiler
Espire Header |
| .UL |
uLAW Audio File |
| .ULD |
Procomm
Uploaded Files |
| .ULS |
Internet Location
Service |
| .ULT |
UltraTracker Music
Module |
| .UMB |
MemMaker Backup
Archive |
| .UNI |
MikMod (UniMod)
Format, Forcast Pro Data File |
| .UNX |
Text File (usually
UNIX) |
| .UPD |
dBase
Update File, Universal Print Driver (cross-platform),
Updated Program Data (various) |
| .UPI |
ULead Photo Impact
Program File |
| .UPO |
dBase
Compiled Update File |
| .UPX |
ULead Photo Express
Saved Image File |
| .URF |
Radar ViewPoint
Universal Radar Format |
| .URL |
Internet
Location |
| .USE |
MKS Source Integrity
File |
| .USL |
LaserJet Landscape
Font |
| .USP |
PageMaker
Printer Font, LaserJet Portrait Font |
| .USR |
User Database
(various) |
| .UTL |
Sound File |
| .UTP |
BinPatch Patch Data
File |
| .UU |
Compressed Archive
File (UUENCODE) |
| .UUD |
Uudecoded |
| .UUE |
Uuencoded |
| .UW |
Audio File, Raw
Unsigned Word (16-bit) Data, Unitype GlobalWriter File |
| .UWF |
UltraTracker Wave
File |
| |
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