List Of All Extensions And Filetypes - U


This is an easy approach from me to give and describe each and every filetype and extension as much as possible.
here is the list for the information about various filetypes and extensions starting from alphabet U
Extension Information
U Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
U Subsampled Raw YUV Bitmap
U Unreal System File
U Unreal Tournament 2003 System File (Epic Games, Inc.)
U Nitpicker Ipflow File
U2 Telelogic Tau UML Model
U2E Unreal Game Translation
U2P Telelogic Tau UML Program Text File
U3D Ultimate3D Engine 3D Engine (Ultimate3D)
U3D Universal 3D File
U3P U3 Platform Install File (U3 LLC.)
U4A UnInstaller Archive
U8 Raw Unsigned 8-Bit Audio Data
U96 EasyZip Temporary File
U98 Urdu 98 Document
UAE WinUAE 0.8.22 Game Configuration File
UAP User Agent Wireless Telephony Profile
UAS PhotoImpact Backup/Recovery File (Ulead Systems, Inc.)
UAX Unified Application eXchange Format (UAX Project)
UAX Unreal Tournament 2003 Sound (Epic Games, Inc.)
UAX Deus Ex
UAX Harry Potter
UAX Rune
UAX Undying
UAX Unreal / Unreal 2
UAX Unreal Audio File (Epic Games, Inc.)
UB Raw Unsigned Byte (8-bit) Data
UB Audio
UBB BASIC UBAS File
UBD BASIC UBAS File
UBK Embiid Reader eBook (Embiid Inc.)
UBK National Construction Estimator 32 User Costbook
UBM Iphoto Mtwain Install File
UBS Tracesrv Bugslayer Utility File
UC AutoCut Flash Firmware File (Autometrix)
UC Unreal Tournament Code File (Epic Games, Inc.)
UC2 UltraCompressor II Compressed Archive (AIPNL)
UCC National UCC Financing Statement Software Uniform Commercial Code Form (National LawForms, Inc.)
UCD Prosa/ OM Use Case Diagram
UCE UniCode Extensions
UCF Epson Personal Settings Information (Epson Corporation)
UCF Xilinx Foundation User Constraint File
UCG ULEAD MediaStudio CG Infinity Graphic (Corel Corporation)
UCI Samsung YP-P2 Theme
UCM Urban Chaos Game File
UCMN Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UCN U-Act Configurator Configuration Storage File (Unisys)
UCN Compressed Archive
UCR MicroSim PCBoard Unrouted Nets Report
UCS Homeworld Localized Unicode Strings (Sierra Entertainment, Inc.)
UCS Universal Classification Standard Database File
UCSETTINGS Universal Converter Configuration File (Anthony R. Daly)
UCV Universal Converter Conversion File (Anthony R. Daly)
UCX Rational XDE (IBM)
UD AOL 4.0 (America Online, Inc.)
UD OmniPage User Dictionary (Nuance Communications, Inc.)
UDB PINO 3-Server File
UDB VBA32 Antivirus Signature File (VirusBlokAda Ltd.)
UDB Windows2000 Uniqueness Database File (Microsoft Corporation)
UDB Works File (Microsoft Corporation)
UDC Systems Management Server (SMS) Collection Evaluator Updates Collection (Microsoft Corporation)
UDC Acrobat Spelling File (Adobe Systems Incorporated)
UDC Fh5 US English File
UDD OllyDbg Module Information (Oleh Yuschuk)
UDF Excel User Defined Function (Microsoft Corporation)
UDF Photostyler Image Filter
UDF X-ray Diffraction Data File Format
UDF Windows NT Uniqueness Database File
UDF Uyap Dokuman Editoru Document (Türkiye Barolar Birliği)
UDI Dazzle DVD Complete (Pinnacle Systems, Inc.)
UDI Corel Graphics Ver 10 Draw Script Textures Bitmap File (Corel)
UDL ADONIS User Export From Database (BOC Group)
UDL Data Link (Microsoft Corporation)
UDM MapView User-Defined Module (MotCreations)
UDS FIMware Database (Uniform Data System for Medical Rehabilitation, a division of UB Foundation Activities, Inc.)
UDS NHTSA UDS-1992 Crash Test Data
UDS Sierra Generations Geneology Family File (Sierra Entertainment, Inc.)
UDW Raw Unsigned DoubleWord (32-bit) Data
UE2 Encrypted Archive
UEED Uconomix Encryption Engine Encrypted Directory (Uconomix Technologies Pvt Ltd)
UEEF Uconomix Encryption Engine Encrypted File (Uconomix Technologies Pvt Ltd)
UEF Unified Emulator Format
UENC UltraEdit Encrypted File (IDM Computer Solutions, Inc.)
UEZ COOL 3D (Ulead Systems, Inc.)
UFA UFA Compressed File Archive
UFA GIF Animator Animation Object Information (Ulead)
UFD PDP-10 User File Directory
UFF DataWave Physiological Data File
UFI UFOCaptureV2 Presets (SonotaCo)
UFO Total Annihilation Third-party Unit (Cavedog Entertainment)
UFO Ellisys Visual USB Data (Ellisys)
UFO PhotoImpact Graphic (Ulead Systems, Inc.)
UFSD UFS Explorer Professional Recovery RAW Recovery Signatures Database (SysDevSoftware)
UG Drawing File
UGA Ulead GIF Animator Project File (Corel Corporation)
UH Age of Kings (Microsoft Corporation)
UHA UHARC Compressed Archive
UHS Universal Hint System File (Universal Hint System)
UHTM Unreal Tournament File
UI User Interface
UI Qt User Interface (Qt Software)
UI Geoworks UI Compiler Espire Source
UID IBM Voice Type Users File (IBM)
UIF WordPerfect Long Prompts (Corel Corporation)
UIF Magic ISO Universal Image Format File (MagicISO Inc.)
UIH Geoworks UI Compiler Espire Header
UIL X-Motif UIL Table
UIN ICQ 2001+ Saved ICQ Contact Information (ICQ Inc.)
uindex Newsgroup Index File
UIR LabWindows User Interface Resource (National Instruments Corporation)
UIS WindowBlinds Skin
UKA Fifa World Cup Game Data fe Art Legalscr File
UKA UKA Data Archive (HRM Systems AG, CH-Winterthur)
UKS Works File (Microsoft Corporation)
UKX Unreal Tournament 2003 Animation (Epic Games, Inc.)
UK_ Mcguiness File
UL uLAW Audio File
ULD Procomm Uploaded Files
ULF Uniware Layout File (Uniware)
ULP Peugeot Diag 2000 File
ULP EAGLE Layout Editor Script (CadSoft Computer GmbH)
ULS Internet Location Service
ULT UltraTracker Music Module
ULW ULAW - Sun/NeXT
ULX CLAN Lexical File (Child Language Data Exchange System)
ULX Glulx Game
UM Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UM The Land Of UM World File
UMB MemMaker Backup Archive
UMD UMD Photobook
UMI CDDB Database and PC Music Library in PlayCenter
UML Visual UML Class Diagram & Model (Visual Object Modelers, Inc.)
UMOD Unreal Self-extracting MOD File (Epic Games)
UMOD Unreal Tournament (Epic Games, Inc.)
UMP UModel Project (Altova)
UMR MyEclipse UML Model Repository (Genuitec, LLC.)
UMS Rune
UMX Unreal Tournament 2003 Music (Epic Games, Inc.)
UMX Unreal/Unreal Tournament Music File (Epic Games, Inc.)
UMX U-MYX Player Song Mix Data and Timing Info (U-MYX Ltd.)
UMX Deus Ex
UMX Harry Potter
UNASSIGNED Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNC Files and Settings Transfer Wizard Output Folder (Microsoft Corporation)
UNCIAL Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UND A86 Assembler Undefined Symbols
UNF Btreive Unformatted File
UNI Forcast Pro Data File
UNI MikMod (UniMod) Format
UNIKEY Unikey Software Protection Solution (SecuTech Solution Inc.)
UNION Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNIVERSAL3 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNIX Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNIX UNIX File
UNKNOWN [None]
UNL Informix Binary File Created by UNLOAD Command
UNLOCK Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNM XMap Flight Plan or Flight Plan Statistic File (Delorme)
UNPAC Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNPACK Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UNQ ACT! Saved Unknown Attachment (Best Software CRM Division)
UNQ Fax View File
UNR Unreal Map File
UNS Visual Navigation Suite Export/Import Settings (Jeppesen Marine, Inc.)
UNT AutoCAD Unit Definition (Autodesk, Inc.)
UNUSED Photoline4 Defaults File
UNV SDRC I-DEAS File
UNV BusinessObjects/WebIntelligence Universe File
UNV Forecast Pro Univariate Forecast File (Business Forecast Systems, Inc.)
UNX Text File
UNX Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UN_ Ntgraph Setup30 file
UOF Uniform Office Format
UOL PhotoImpact Object Library File
UP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UP2 Cool3d Plug-ins Board File
UPC Ultimate Paint (J-T-L Development Inc.)
UPCASE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPD ProUpdater Per/Directory Options Setting File
UPD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPD Universal Print Driver
UPD VideoStudio Scene Information (Ulead Systems, Inc.)
UPD Updated Program Data
UPD dBASE Update File
UPD Ulead Private Data (Corel Corporation)
UPDATE ISAPI Loader New ISAPI Application (EGGcentric)
UPDATE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPDATE Program or Data File Update
UPDATEALL Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPDATEINFO Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPDATES Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPDF UltraPdf Publication (Software995)
UPF Universal Picture Format Bitmap
UPF Nokia Phone Digital Photo (Nokia)
UPG Firmware Upgrade File
UPG Grafik Anim File
UPI ULead Photo Impact Program File (Corel Corporation)
UPI Iphoto4 Programs Plug-in File
UPJ ULead Project File (Corel Corporation)
UPK Mass Effect Game File Archive (EA International (Studio and Publishing) Ltd.)
UPL Starmoney Agent Download File
UPL Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UPM PenMail Document (UC-Logic Technology Corp.)
UPO dBASE Compiled Update File
UPP Uniprint Unified Printer Parameter
UPR FileMaker User Spelling Dictionary
UPS Works File (Microsoft Corporation)
UPT Connectivity Memory Model Update Timing Input File
UPX ULead Photo Express Saved Image File (Corel Corporation)
UPZ Starmoney Agent Download File
UQM The Ur-Quan Masters Archive (The Ur-Quan Masters Team)
URBS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
URD Ultra Recall Database (Kinook Software, Inc.)
URD-JOURNAL Ultra Recall Journal Update File (Kinook Software, Inc.)
URF AppFace Skin (Matinsoft Inc.)
URF Radar ViewPoint Universal Radar Format
URF ProWORX Nxt User Configurable Register Editor File (Schneider Electric)
URI List of Uniform Resource Identifiers
URIS List of Uniform Resource Identifiers
URL Internet Location
URLS GetRight URL List (Headlight Software, Inc.)
URS ControlDraw User Requirements Specifier (ControlDraw Ltd.)
URT Utah Raster Image
US Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USA Office Header File (Microsoft Corporation)
USA Unreal Saved Game File
USAGE Snort File
USAGE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USB USB Protocol Analyzer Trace
USB Syssoft Sandra File
USB D-Link FM Radio Update
USD Epson PRINT Image Framer (PIF) Framer File (Seiko Epson Corp.)
USE Log File
USE MKS Source Integrity File
USE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USER Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USERPROFILE Live Update User Profile (Symantec Corporation)
USF Core Media Player XML Universal Subtitle Format File (CoreCodec, Inc.)
USF Nintendo Ultra 64 Sound Format (Nintendo)
USI Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USI UsiXML UI Description File (Universite Catholique de Louvain-la-Neuve)
USK Ultraplayer Ultraplayer Playlist File (UltraCo, Inc)
USL ProWORX Nxt USL Loadables (Schneider Electric)
USL LaserJet Landscape Font
USL PC-Bibliothek User Dictionary (Bibliographisches Institut & F.A. Brockhaus AG)
USP LaserJet Portrait Font
USP SIMCA-P/SIMCA-P+ Project (Umetrics AB)
USP PageMaker Printer Font (Adobe Systems Incorporated)
USR User Database
USR MicroImages User-specific Information (MicroImages, Inc.)
USR Uplink Player Information File (Introversion Software)
USR Pegasus Mail User Information (David Harris)
USR FileMaker Pro Runtime Engine Database Application (FileMaker, Inc.)
USR ERGO Receiver Configuration File (Creative Express Corporation)
USR Daqarta Extended Audio Data (Interstellar Research)
USR Photo Paint User Defined Filter (Corel)
USR Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USS PhotoImpact Exported Slicing Pattern (Ulead Systems, Inc.)
USS WinUAE Saved State
UST WiFi SiStr Exported User Theme (DNsoft.be)
USTAR POSIX tar Compressed Archive
USX Unreal Tournament 2003 Static Mesh (Epic Games, Inc.)
USYM Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
USZ UsiXML UI Description File (Universite Catholique de Louvain-la-Neuve)
UT2 Unreal Tournament Map (Epic Games, Inc.)
UT2MOD Unreal Tournament 2003 Game Modification File (Epic Games)
UT3 Unreal Tournament 3 Map (Epic Games, Inc.)
UT4MOD Unreal Tournament 2004 MOD Installation Package (Epic Games)
UTC BioWare Aurora Engine Creature (BioWare Corp.)
UTD BioWare Aurora Engine Doors (BioWare Corp.)
UTE BioWare Aurora Engine Encounter (BioWare Corp.)
UTE Rukus 110 File
UTF AOL Updating Files (America Online, Inc.)
UTI SafeGuard PrivateCrypto Encrypted Archive (Utimaco Safeware AG)
UTI Spybot - Search & Destroy Usage Tracking (PepiMK Software)
UTI BioWare Aurora Engine Item (BioWare Corp.)
UTIL Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UTIL2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UTILITIES Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UTILITY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UTILS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UTL QuickBooks Data (Intuit Inc.)
UTL Sound File
UTM BioWare Aurora Engine Store (BioWare Corp.)
UTMP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UTP BinPatch Patch Data File
UTP BioWare Aurora Engine Placeable Object (BioWare Corp.)
UTS BioWare Aurora Engine Sound (BioWare Corp.)
UTS Spybot - Search & Destroy Include File (PepiMK Software)
UTT BioWare Aurora Engine Trigger (BioWare Corp.)
UTW BioWare Aurora Engine Waypoint (BioWare Corp.)
UTX Deus Ex
UTX Unreal Tournament 2003 (or UT 99) Texture (Epic Games, Inc.)
UTX Rune
UTX Unicode File
UTX Undying
UTX Harry Potter
UTXT Various Programs Unicode Text File
UU Compressed Archive File
UUCP Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UUD Uudecoded
UUE Uuencoded
UUE Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
UUT Genesis 2000 (Genesis 2000, Inc.)
UV EA Games Video File (Electronic Arts, Inc.)
UV2 Jane's Combat Simulations F-15
UVP ULEAD MediaStudio Video Paint Graphic (Corel Corporation)
UVR Ulead Cool 360 Viewer File (Corel Corporation)
UVV Listlabl File
UVW geoManager/geoInterface User View
UVX Unreal Tournament 2003 Saved Game (Epic Games, Inc.)
UW Raw Unsigned Word (16-bit) Data
UW Unitype GlobalWriter File
UW Audio
UWF UltraTracker Wave File
UWL WordPerfect User Word List (Corel Corporation)
UWL GroupWise User Word List (Novell, Inc.)
UWS UniTrader 2006 Website Archive (UniTechnology Limited)
UWT UniTrader Template Archive (UniTechnology Ltd.)
UX UNIX File
UXD URLBase URL Database (Terria Development)
UXF UMLet UML eXchange Format (UMLet Team)
UXP URLBase URL Database (v. 5.1) (Terria Development)
UXX Unreal Tournament 2003 Cache (Epic Games, Inc.)
UXY Orchida Embroidery System (Orchida Soft)
UYVY ImageMagick Ver. 5.3.2 Perlmagick File (ImageMagick Studio LLC)
UYVY Interleaved YUV Raw Image
UZ Unreal Tournament Server File
UZE Ultimate Zip Compresion Agent
UZR UZR 3D Streamable 3D File Format

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