| Estensione .U3D | Universal 3D | 
					
						| Estensione .UAX | Unreal Audio | 
					
						| Estensione .UIF | MagicISO Universal Image Format | 
					
						| Estensione .UPD | Update | 
					
						| Estensione .UPG | Firmware Upgrade | 
					
						| Estensione .USR | User Specific Settings | 
					
						| Estensione .U | Subsampled Raw YUV Bitmap Image | 
					
						| Estensione .U00 | Commodore C64 Universal | 
					
						| Estensione .U01 | Barudan Embroidery | 
					
						| Estensione .U08 | UFile Data | 
					
						| Estensione .U10 | UFile 2010 Tax Return | 
					
						| Estensione .U11 | UFile 2011 Tax Return | 
					
						| Estensione .U12 | UFile 2012 Tax Return | 
					
						| Estensione .U255LAW | Exponential 8-bit Sound | 
					
						| Estensione .U2CAR | NFS:U2 Car | 
					
						| Estensione .U32 | Authorware Cover | 
					
						| Estensione .U3I | U3 Application Information | 
					
						| Estensione .U3P | U3 Platform Install | 
					
						| Estensione .U8 | Lemings 3D Audio | 
					
						| Estensione .U96 | EasyZip Temporary | 
					
						| Estensione .U98 | USA 98 Streets & Destinations Tour | 
					
						| Estensione .UAE | WinUAE Configuration | 
					
						| Estensione .UAL | Entrust Unattended Login Credentials | 
					
						| Estensione .UAP | WAP User Agent Profile | 
					
						| Estensione .UAQ | Microsoft Windows Action Queue | 
					
						| Estensione .UAS | Ulead PhotoImpact Backup | 
					
						| Estensione .UAV | OpenPilot UAV Settings | 
					
						| Estensione .UB | 8-bit Unsigned Byte RAW Data | 
					
						| Estensione .UB1 | X-Driven DRS-1100 Recorded Video | 
					
						| Estensione .UBB | BEA ELink Adapter Configuration | 
					
						| Estensione .UBD | BASIC UBAS | 
					
						| Estensione .UBF | MXT3010 Universal Boot Format | 
					
						| Estensione .UBI | Ubisoft Logo Animation | 
					
						| Estensione .UBIFS | Linux UBIFS Image | 
					
						| Estensione .UBJ | Universal Binary JSON Fiile | 
					
						| Estensione .UBK | Embiid Ebook | 
					
						| Estensione .UBL | DM35x User Boot Loader | 
					
						| Estensione .UBM | IPhoto Mtwain Install | 
					
						| Estensione .UBOX | Universe Sandbox Saved Data | 
					
						| Estensione .UBR | IIS WCAT Configuration | 
					
						| Estensione .UBS | Tracesrv Bugslayer Utility | 
					
						| Estensione .UC | UnrealScript Class | 
					
						| Estensione .UC2 | UltraCompressor II Compressed Archive | 
					
						| Estensione .UCCAPILOG | Microsoft Windows Live Messenger UCC API Log | 
					
						| Estensione .UCD | Prosa Diagram | 
					
						| Estensione .UCE | Microsoft Windows XP System32 | 
					
						| Estensione .UCF | Epson Personal Settings Information | 
					
						| Estensione .UCI | Samsung YP-P2 Theme | 
					
						| Estensione .UCL | Unreal Tournament Cache | 
					
						| Estensione .UCLS | ObjectAid UML Explorer Class Diagram | 
					
						| Estensione .UCM | Urban Chaos Game File | 
					
						| Estensione .UCN | U-Act Configurator Configuration Storage | 
					
						| Estensione .UCP | Uniformity Correction Parameters | 
					
						| Estensione .UCR | MicroSim PCBoard Unrouted Nets Report | 
					
						| Estensione .UCS | Homeworld Localized Unicode Strings | 
					
						| Estensione .UCSETTINGS | Universal Converter Settings | 
					
						| Estensione .UCT | Ultrasound Computed Tomography | 
					
						| Estensione .UCV | Universal Converter Conversion | 
					
						| Estensione .UCX | Rational XDE | 
					
						| Estensione .UD | OmniPage User Dictionary | 
					
						| Estensione .UDA | ZEMAX Model Data | 
					
						| Estensione .UDB | Microsoft Works | 
					
						| Estensione .UDC | System Management Server | 
					
						| Estensione .UDCX | Microsoft Office Universal Data Connection | 
					
						| Estensione .UDEB | Debian Package | 
					
						| Estensione .UDF | Windows NT Uniqueness Database | 
					
						| Estensione .UDG | UDraw(Graph) | 
					
						| Estensione .UDI | CorelDRAW Draw Script Textures Bitmap | 
					
						| Estensione .UDID | Google Android Unique Device IDentifier | 
					
						| Estensione .UDIF | Apple Mac OS X Universal Disk Image Format | 
					
						| Estensione .UDK | Unreal Map | 
					
						| Estensione .UDL | Microsoft Data Link | 
					
						| Estensione .UDM | MapView User Module | 
					
						| Estensione .UDO | Moray UDO 3D | 
					
						| Estensione .UDP | Corel VideoStudio Scene Information | 
					
						| Estensione .UDS | NHTSA UDS-1992 Crash Test Data | 
					
						| Estensione .UDSTATE | Motorola Media Finder | 
					
						| Estensione .UDT | User Defined Type Data Or VisiLogic Utilities | 
					
						| Estensione .UDW | Raw Unsigned DoubleWord (32-bit) Data | 
					
						| Estensione .UDX | PI Expert Design Software | 
					
						| Estensione .UEA | Protector Suite QL | 
					
						| Estensione .UEAF | Upek Protected Single | 
					
						| Estensione .UEED | Uconomix Encryption Engine Encrypted Directory | 
					
						| Estensione .UEM | LDC Region | 
					
						| Estensione .UENC | UltraEdit Encrypted Text | 
					
						| Estensione .UES | Ulead Photo Explorer Slide Show | 
					
						| Estensione .UEW | UltraEdit Wordfile | 
					
						| Estensione .UEZ | Ulead COOL 3D Graphics | 
					
						| Estensione .UFA | GIF Animator Animation Object Information | 
					
						| Estensione .UFC | SATURN Suite | 
					
						| Estensione .UFDL | Universal Forms Description Language | 
					
						| Estensione .UFDR | UFED Physical Analyzer Report Package | 
					
						| Estensione .UFF | DataWave SciWorks Physiological Data | 
					
						| Estensione .UFI | UFOCaptureV2 | 
					
						| Estensione .UFM | Unicode TrueType Font | 
					
						| Estensione .UFO | Ulead PhotoImpact Object | 
					
						| Estensione .UFP | Ulead Photo Project | 
					
						| Estensione .UFS | FreeBSD PC-BSD Unix File System | 
					
						| Estensione .UFS.UZIP | FreeBSD Compressed Unix File System | 
					
						| Estensione .UFX | Ultimate 3D Game Engine Material | 
					
						| Estensione .UGD | Need For Speed Underground | 
					
						| Estensione .UGF | Go Game | 
					
						| Estensione .UGR | Apophysis Gradient | 
					
						| Estensione .UGS | Unknown File Extension | 
					
						| Estensione .UHA | UHARC Compressed Archive | 
					
						| Estensione .UHH | Eurotherm Hydra History Encrypted | 
					
						| Estensione .UHS | Universal Hint System Binary | 
					
						| Estensione .UHTM | Unreal Tournament | 
					
						| Estensione .UHTML | UHTML Document | 
					
						| Estensione .UI | User Interface | 
					
						| Estensione .UIBAK | UltraISO Backup Disk Image | 
					
						| Estensione .UIC | COCO Unit ICon | 
					
						| Estensione .UID | IBM Voice Type Users | 
					
						| Estensione .UID-ZPS | Zoner Photo Studio Picture Autobackup | 
					
						| Estensione .UIH | Geoworks UI Compiler Espire Header | 
					
						| Estensione .UIL | IBM AIX User Interface Language | 
					
						| Estensione .UIN | ICQ 2001 Saved ICQ Contact Information | 
					
						| Estensione .UIR | LabWindows User Interface Resource | 
					
						| Estensione .UIS | WindowBlinds Personality | 
					
						| Estensione .UIT | UIX XML Template | 
					
						| Estensione .UIX | UiXML Page | 
					
						| Estensione .UIZ | Spybot Search & Destroy Updater | 
					
						| Estensione .UK | English (British) Language Translation | 
					
						| Estensione .UKA | Fifa World Cup Game Data | 
					
						| Estensione .UKE | Ulead VideoStudio | 
					
						| Estensione .UKO | UK Offshore Operators Association (OKOOA) P1/90 Data | 
					
						| Estensione .UKS | Microsoft Works | 
					
						| Estensione .UKX | Unreal Tournament Animation | 
					
						| Estensione .UKY | UltraMixer Licence Key | 
					
						| Estensione .ULAW | Raw CCITT/ITU G.711 US Telephony Audio Format | 
					
						| Estensione .ULB | COBOL Unisys Library | 
					
						| Estensione .ULD | Unified Luminaire Datafile | 
					
						| Estensione .ULF | Universal List | 
					
						| Estensione .ULG | ULG Bitmap | 
					
						| Estensione .ULP | EAGLE Script | 
					
						| Estensione .ULS | NetMeeting User Location Service | 
					
						| Estensione .ULT | Ultratracker Music Module (MOD) | 
					
						| Estensione .ULW | Raw CCITT/ITU G.711 US Telephony Audio Format | 
					
						| Estensione .ULX | Glulx Data | 
					
						| Estensione .ULYS | Ulysses Project | 
					
						| Estensione .ULZ | USBlyzer Data Capture | 
					
						| Estensione .UMB | MemMaker Backup | 
					
						| Estensione .UMD | UMD Mobile Ebook | 
					
						| Estensione .UMF | File Transport | 
					
						| Estensione .UML | Visual UML Class Diagram & Model | 
					
						| Estensione .UMLCLASS | Java UML Class Model | 
					
						| Estensione .UMLX | Visual UML XML Model | 
					
						| Estensione .UMM | Unified Molecular Modeling | 
					
						| Estensione .UMOD | Unreal Tournament MOD Installation Package | 
					
						| Estensione .UMP | UModel Project | 
					
						| Estensione .UMR | MyEclipse UML Model Repository | 
					
						| Estensione .UMV | Are You Afraid Of The Dark? Video | 
					
						| Estensione .UMX | Unreal Tournament Music Package | 
					
						| Estensione .UNA | SIMS Unauthorized Data | 
					
						| Estensione .UNAUTH | SiteMinder Unauthorized Message | 
					
						| Estensione .UNCOMPRESSED_SIZE | Singularity Game | 
					
						| Estensione .UND | Urban Network Data | 
					
						| Estensione .UNDEFINED | Undefined | 
					
						| Estensione .UNDF | Undefined File Format | 
					
						| Estensione .UNDO | Backup | 
					
						| Estensione .UNF | Btreive Unformatted | 
					
						| Estensione .UNI | Forecast Pro Data | 
					
						| Estensione .UNIC | Unic Tracker Sound | 
					
						| Estensione .UNITXT | YS FLIGHT Language | 
					
						| Estensione .UNITY | Unity Scene | 
					
						| Estensione .UNITY3D | Unity Scene Web Player | 
					
						| Estensione .UNITYPACKAGE | Unity Package | 
					
						| Estensione .UNITYPROJ | Unity 3D Project | 
					
						| Estensione .UNIT_VARIANT | Total War Unit Variant Settings | 
					
						| Estensione .UNIX | Unix | 
					
						| Estensione .UNIXYZ | UniChem XYZ Chemical Modeller Input | 
					
						| Estensione .UNK | UVProbe | 
					
						| Estensione .UNKNOWN | Unknown File Extension | 
					
						| Estensione .UNL | Garmin MapSource Unlock | 
					
						| Estensione .UNQ | ACT! 3.0 Email Message Attachment | 
					
						| Estensione .UNR | Unreal Map | 
					
						| Estensione .UNS | Visual Navigation Suite Export Or Import Settings | 
					
						| Estensione .UNT | AutoCAD Unit Definition | 
					
						| Estensione .UNUSED | Photoline 4 Defaults | 
					
						| Estensione .UNV | BusinessObjects Universe | 
					
						| Estensione .UNX | Unix Text | 
					
						| Estensione .UOF | Uniform Office Format | 
					
						| Estensione .UOL | PhotoImpact Clipart Image | 
					
						| Estensione .UOP | Unified Office Format Presentation | 
					
						| Estensione .UOS | Unified Office Format Spreadsheet | 
					
						| Estensione .UOT | Unified Office Format Text | 
					
						| Estensione .UP2 | Ulead Cool 3D Plugins Board | 
					
						| Estensione .UPA | Fake Download | 
					
						| Estensione .UPB | Mvision Firmware Update | 
					
						| Estensione .UPC | Ultimate Paint Component File Format | 
					
						| Estensione .UPDATE | ISAPI Update | 
					
						| Estensione .UPDF | UltraPdf Publication | 
					
						| Estensione .UPF | Nokia Phone Digital Photo | 
					
						| Estensione .UPI | Ulead PhotoImpact Plugin | 
					
						| Estensione .UPJ | Ulead Project | 
					
						| Estensione .UPK | Unreal 3 Game Data Package | 
					
						| Estensione .UPK0 | Metro 2033 Game | 
					
						| Estensione .UPL | StarMoney Agent Download | 
					
						| Estensione .UPLOAD | Upload | 
					
						| Estensione .UPM | PenMail | 
					
						| Estensione .UPO | DBASE Compiled Update Data | 
					
						| Estensione .UPOI | IGO Points Of Interest | 
					
						| Estensione .UPP | Ghostscript Uniprint Unified Printer Parameter | 
					
						| Estensione .UPR | FileMaker User Spelling Dictionary | 
					
						| Estensione .UPS | Microsoft Works | 
					
						| Estensione .UPT | Connectivity Memory Model Update Timing Input | 
					
						| Estensione .UPX | Ulead Photo Express Saved Image | 
					
						| Estensione .UPZ | StarMoney Agent Download | 
					
						| Estensione .UQM | The Ur-Quan Masters Archive | 
					
						| Estensione .URC | Unicenter Remote Control | 
					
						| Estensione .URD | Uno Reflection Data | 
					
						| Estensione .URD-JOURNAL | Ultra Recall Journal Update | 
					
						| Estensione .URF | Radar ViewPoint Universal Radar Format | 
					
						| Estensione .URI | List Of Uniform Resource Identifiers | 
					
						| Estensione .URIS | Uniform Resource Identifiers | 
					
						| Estensione .URL | Internet Shortcut - URL - Uniform Resource Locator | 
					
						| Estensione .URLS | GetRight Internet Shortcuts List | 
					
						| Estensione .URL_ | Internet Shortcut - URL - Uniform Resource Locator | 
					
						| Estensione .URP | Universal Report | 
					
						| Estensione .URQ | Review QuickChart Chart | 
					
						| Estensione .URR | Uniface Signatures | 
					
						| Estensione .URS | ControlDraw User Requirement Specifier | 
					
						| Estensione .URT | Utah Run-Length Encoded Bitmap Image | 
					
						| Estensione .US | English Language Translation | 
					
						| Estensione .US? | Microsoft Word Font | 
					
						| Estensione .USA | Microsoft Office Headers | 
					
						| Estensione .USB | SiSoftware Sandra | 
					
						| Estensione .USBSO | Teledyne LeCroy Protocol Analyzer Settings | 
					
						| Estensione .USC | USC Module Definition | 
					
						| Estensione .USD | Epson Print Image Frame | 
					
						| Estensione .USDX | Tom Clancys Rainbow Six: Vegas Game | 
					
						| Estensione .USECASEDIAGRAM | Microsoft Visual Studio Use Case Diagram | 
					
						| Estensione .USEQ | USeq Genome Data | 
					
						| Estensione .USER | Microsoft Visual Studio Project User Options | 
					
						| Estensione .USERPROFILE | Symantec User Profile | 
					
						| Estensione .USERSETTINGS | User Settings | 
					
						| Estensione .USERTILE-MS | Microsoft Windows 8 Release Preview User Tile | 
					
						| Estensione .USF | Core Media Player XML Universal Subtitle Format | 
					
						| Estensione .USFLIB | Nintendo 64 Song Library | 
					
						| Estensione .USG | PC-Doctor For Windows | 
					
						| Estensione .USH | Creston SIMPL Windows | 
					
						| Estensione .USI | UsiXML UI Description | 
					
						| Estensione .USKN | KSDev ThemeEngine Theme | 
					
						| Estensione .USL | LaserJet Landscape Font | 
					
						| Estensione .USM | ScaleForm GFX Video | 
					
						| Estensione .USP | PageMaker Printer Font | 
					
						| Estensione .USRP | UTM Universe Polar Stereographic | 
					
						| Estensione .USS | WinUAE Saved State | 
					
						| Estensione .UST | WiFi SiStr Exported User Theme | 
					
						| Estensione .USTAR | Uniform Standard Tape Archive Format | 
					
						| Estensione .USV | LG Xenon Mobile Phone Contact List | 
					
						| Estensione .USX | Unreal StaticMesh (hardware Brushes) | 
					
						| Estensione .UT2 | Unreal Tournament Map | 
					
						| Estensione .UT2MOD | Unreal Tournament 2003 MOD Installation Package | 
					
						| Estensione .UT3 | Unreal Tournament 3 Map | 
					
						| Estensione .UT4MOD | Unreal Tournament 2004 MOD Installation Package | 
					
						| Estensione .UTB | µTBackup Backup | 
					
						| Estensione .UTC | BioWare Aurora Game Engine Creature | 
					
						| Estensione .UTD | BioWare Aurora Game Engine Door | 
					
						| Estensione .UTE | BioWare Aurora Game Engine Encounter | 
					
						| Estensione .UTF | AOL Updating Files | 
					
						| Estensione .UTF8 | Unicode UTF-8 Encoded Text | 
					
						| Estensione .UTI | Spybot - Search & Destroy Includes | 
					
						| Estensione .UTL | QuickBooks Data | 
					
						| Estensione .UTM | BioWare Aurora Game Engine Store | 
					
						| Estensione .UTP | BioWare Aurora Game Engine Placeable Object | 
					
						| Estensione .UTPART | µTorrent Unfinished Download | 
					
						| Estensione .UTS | Spybot - Search & Destroy Include | 
					
						| Estensione .UTT | BioWare Aurora Engine Trigger | 
					
						| Estensione .UTW | BioWare Aurora Engine Waypoint | 
					
						| Estensione .UTX | Unreal Texture | 
					
						| Estensione .UTXT | Unicode Text | 
					
						| Estensione .UTZ | Symbian OS User Interface Theme | 
					
						| Estensione .UU | Uuencoded (compressed) File Archive (ascii) | 
					
						| Estensione .UUD | UUDecoded | 
					
						| Estensione .UUE | UUEncoded | 
					
						| Estensione .UUS | Ultra Utility Skin | 
					
						| Estensione .UV2 | Janes Combat Simulations: F-15 | 
					
						| Estensione .UVCAB | UVScreenCamera Films | 
					
						| Estensione .UVF | UVScreenCamera Films | 
					
						| Estensione .UVNTS | UVScreenCamera Notes | 
					
						| Estensione .UVO | Sanyo Katana DLX Voice Memo | 
					
						| Estensione .UVP | Ulead MediaStudio | 
					
						| Estensione .UVPROJ | µVision4 Project | 
					
						| Estensione .UVR | UVR Mesh | 
					
						| Estensione .UVS | UVScreenCamera Segments | 
					
						| Estensione .UVSEG | UVScreenCamera Segments | 
					
						| Estensione .UVW | 3D Studio MAX UVW Coordinates | 
					
						| Estensione .UVX | Unreal Tournament Saved Game | 
					
						| Estensione .UW | Unsigned Word (16-bit) Music | 
					
						| Estensione .UWF | UltraTracker WaveSample Music | 
					
						| Estensione .UWL | Novell GroupWise User Word List | 
					
						| Estensione .UXDC | Microsoft Excel Data Retrieval Service Connection | 
					
						| Estensione .UXF | UMLet UML EXchange Format | 
					
						| Estensione .UXX | Unreal Tournament 2003 Cache | 
					
						| Estensione .UXY | Barudan Embroidery Outline | 
					
						| Estensione .UXZ | IBM Flex CMM Update | 
					
						| Estensione .UYVY | YUV 16-bit Image Format | 
					
						| Estensione .UZ2 | Unreal Tournament Compressed | 
					
						| Estensione .UZE | UltimateZip Compressed Archive | 
					
						| Estensione .UZIP | FreeBSD Compressed Disk Image | 
					
						| Estensione .UZY | Backdoor.Sokacaps |