Files starting with U

#	File Extension	Full File Name
1	File Extension U	Unreal Tournament Class Package
2	File Extension U00	The Price Is Right 2010 Game
3	File Extension U01	Barudan Embroidery
4	File Extension U08	UFile Data
5	File Extension U10	UFile 2010 Tax Return
6	File Extension U11	UFile 2011 Tax Return
7	File Extension U12	UFile 2012 Tax Return
8	File Extension U14	Embird Embroidery Software Data Format
9	File Extension U255LAW	Exponential 8-bit Sound
10	File Extension U2CAR	NFS:U2 Car
11	File Extension U32	Authorware Cover
12	File Extension U3D	Universal 3D Format
13	File Extension U3I	U3 Application Information Format
14	File Extension U3P	U3 Smart Application
15	File Extension U8	3D Lemmings Audio Format
16	File Extension U96	EasyZip Temporary
17	File Extension UAE	WinUAE Configuration
18	File Extension UAL	Entrust Unattended Login Credentials
19	File Extension UAP	SIMATIC WinCC User Archive Export
20	File Extension UAQ	Microsoft Windows Action Queue
21	File Extension UAR	Uniface Deployment Archive Format
22	File Extension UAS	Ulead PhotoImpact Backup
23	File Extension UASSET	UnrealEd Resource Format
24	File Extension UAV	OpenPilot UAV Settings
25	File Extension UAX	Unreal Audio Package
26	File Extension UB	Unsigned Byte Audio Format
27	File Extension UBIFS	Linux UBIFS Image
28	File Extension UBJ	Universal Binary JSON Format
29	File Extension UBM	IPhoto Mtwain Install
30	File Extension UBOT	UBot Project Format
31	File Extension UBOX	Universe Sandbox Data Format
32	File Extension UBR	IIS WCAT Configuration
33	File Extension UBX	U-center UBX GPS Log Data Format
34	File Extension UBZ	Open-Sankore Document Format
35	File Extension UC	UnrealScript Class
36	File Extension UC2	UltraCompressor 2 Archive
37	File Extension UCB	Unstoppable Copier Batch Scirpt Format
38	File Extension UCCAPILOG	Microsoft UCC API Log Format
39	File Extension UCD	Prosa Diagram
40	File Extension UCE	Windows UCE System Format
41	File Extension UCF	WebEx Media Format
42	File Extension UCI	UFS Explorer Backup Format
43	File Extension UCL	Unreal Tournament Cache Format
44	File Extension UCLS	ObjectAid UML Explorer Class Diagram
45	File Extension UCM	Crazy Machines Model Format
46	File Extension UCP	SmartWare Communications Profile
47	File Extension UCR	MicroSim PCBoard Unrouted Nets Report
48	File Extension UCS	Homeworld Localized Unicode Strings
49	File Extension UCSETTINGS	Universal Converter Settings
50	File Extension UCT	UC Browser Theme Format
51	File Extension UCV	Universal Converter Conversion
52	File Extension UCX	Rational XDE
53	File Extension UD	OmniPage User Dictionary
54	File Extension UDA	ZEMAX Model Data
55	File Extension UDB	Dynamics AX User Database Format
56	File Extension UDC	Adobe InDesign User Dictionary
57	File Extension UDCX	Universal Data Connection Format
58	File Extension UDEB	Debian Package Format
59	File Extension UDF	Universal Disk Format Format
60	File Extension UDG	UDraw(Graph)
61	File Extension UDI	CorelDRAW Draw Script Textures Bitmap
62	File Extension UDID	Google Android Unique Device IDentifier
63	File Extension UDIF	Apple Mac OS X Universal Disk Image Format
64	File Extension UDK	Unreal Engine Map Format
65	File Extension UDL	Microsoft Universal Data Link Format
66	File Extension UDM	MapView User Module
67	File Extension UDO	Moray UDO 3D
68	File Extension UDP	Corel VideoStudio Scene Information
69	File Extension UDR	Jade Unstructured Data Resource Format
70	File Extension UDS	FIMware Database Format
71	File Extension UDT	User Defined Type Data Format
72	File Extension UDW	Raw Unsigned DoubleWord (32-bit) Data
73	File Extension UDX	PI Expert Design Software
74	File Extension UDZ	UDA ConstructionSuite Data Format
75	File Extension UEA	Protector Suite QL Encrypted Archive
76	File Extension UEC	UltraEdit Settings Format
77	File Extension UEED	Uconomix Encryption Engine Encrypted Directory
78	File Extension UEF	Unified Emulator Format Format
79	File Extension UEL	Tekla Structures Custom Components Data Format
80	File Extension UEM	LDC Region Data Format
81	File Extension UENC	UltraEdit Encrypted Text
82	File Extension UES	Ulead Photo Explorer Slide Show
83	File Extension UEW	UltraEdit Wordfile
84	File Extension UEZ	Ulead COOL 3D Graphics
85	File Extension UF	Crestron SIMPL+ X Generation Compiled Data Format
86	File Extension UFA	GIF Animator Animation Object Information
87	File Extension UFC	SATURN Suite
88	File Extension UFDR	UFED Physical Analyzer Report Package
89	File Extension UFF	DataWave SciWorks Physiological Data
90	File Extension UFI	UFOCaptureV2
91	File Extension UFM	Unicode TrueType Font Format
92	File Extension UFO	Ulead Format Object
93	File Extension UFP	Ulead Photo Project
94	File Extension UFR	Ultra Fractal Format
95	File Extension UFRAW	UFRaw Data Format
96	File Extension UFS	FreeBSD Unix Format System Format
97	File Extension UFSUZIP	Compressed Unix Format System Format
98	File Extension UFX	Ultimate 3D Game Engine Material
99	File Extension UGC	Ace Of Spades Game Data Format
100	File Extension UGD	Need For Speed Underground
101	File Extension UGI	MultiGo Game Data Format
102	File Extension UGP	Aroma Unit Genome Position Data Format
103	File Extension UGR	Apophysis Gradient
104	File Extension UGZ	MultiGo Compressed Game Data Format
105	File Extension UHA	UHarc Compressed Archive
106	File Extension UHH	Eurotherm Hydra History Encrypted
107	File Extension UHS	Universal Hint System Binary
108	File Extension UHTM	Unreal Tournament
109	File Extension UHTML	UHTML Document Format
110	File Extension UI	User Interface Format
111	File Extension UIBAK	UltraISO Backup Disk Image
112	File Extension UIC	COCO Unit ICon
113	File Extension UID	IBM Voice Type Users
114	File Extension UID-ZPS	Zoner Photo Studio Picture Autobackup
115	File Extension UIF	Universal Image Format Disc Image
116	File Extension UIL	IBM AIX User Interface Language
117	File Extension UIN	ICQ 2001 Saved ICQ Contact Information
118	File Extension UIR	LabWindows User Interface Resource
119	File Extension UIS	WindowBlinds User Interface Specification
120	File Extension UIT	UIX XML Template
121	File Extension UITEST	Microsoft Visual Studio Data Format
122	File Extension UIX	UiXML Page
123	File Extension UIZ	Spybot Search & Destroy Updater
124	File Extension UK	English (British) Language Translation
125	File Extension UKA	Fifa World Cup Game Data
126	File Extension UKE	Ulead VideoStudio Data Format
127	File Extension UKR	Adobe Acrobat Language Resource Data Format
128	File Extension UKS	Microsoft Works
129	File Extension UKX	Unreal Animation Package
130	File Extension UKY	UltraMixer Licence Key
131	File Extension UL	Windows Updates Downloader Update List Format
132	File Extension ULAW	Raw U-Law Audio Format
133	File Extension ULB	COBOL Unisys Library
134	File Extension ULC	RevaSoft ULC Application Format
135	File Extension ULD	Unified Luminaire Datafile
136	File Extension ULF	Universal List Format
137	File Extension ULG	ULG Bitmap Image Format
138	File Extension ULI	Microsoft Office Data Format
139	File Extension ULP	EAGLE Script
140	File Extension ULS	NetMeeting User Location Service Format
141	File Extension ULT	UltraTracker Module
142	File Extension ULW	U-Law Audio Format
143	File Extension ULYS	Ulysses Project
144	File Extension ULZ	USBlyzer Data Capture Format
145	File Extension UM3	XWE Data Format
146	File Extension UM4	Samsung Smart TV Video Format
147	File Extension UMAP	Unreal Tournament Map Format
148	File Extension UMB	MemMaker Backup
149	File Extension UMC	SIMPL Application Format
150	File Extension UMD	UMD Mobile Ebook
151	File Extension UMF	MediaHolder Universal Media Format Format
152	File Extension UML	UML Data Object Model
153	File Extension UMLCLASS	UML Class Model
154	File Extension UMLX	Visual UML XML Model
155	File Extension UMM	Unified Molecular Modeling
156	File Extension UMOD	Unreal Tournament Module Format
157	File Extension UMP	UModel Project
158	File Extension UMPROFILE	UltraMon Display Profile Format
159	File Extension UMR	MyEclipse UML Model Repository
160	File Extension UMS	Rune 3D Mesh Format
161	File Extension UMSHORTCUT	UltraMon Data Format
162	File Extension UMV	Are You Afraid Of The Dark? Video Data Format
163	File Extension UMX	Deus Ex Format
164	File Extension UNA	SIMS Unauthorized Data
165	File Extension UNAUTH	SiteMinder Unauthorized Message Format
166	File Extension UNAVAILABLE	Al-Namrood Ransomware Affected Format
167	File Extension UNCOMPRESSED_SIZE	Singularity Game
168	File Extension UNF	Btreive Unformatted
169	File Extension UNI	MikMod UniMOD Module
170	File Extension UNIF	Universal NES Image Format ROM Image Format
171	File Extension UNITXT	YS FLIGHT Language
172	File Extension UNITY	Unity Scene Format
173	File Extension UNITY3D	Unity Web Player Format
174	File Extension UNITYPACKAGE	Unity Package Format
175	File Extension UNITYPROJ	Unity 3D Project
176	File Extension UNIT_VARIANT	Total War Unit Variant Settings
177	File Extension UNIX	Unix
178	File Extension UNK	UVProbe Format
179	File Extension UNKNOWN	Unknown Format Type
180	File Extension UNKNOWN_VIDEO	Youtube API Video Information Format
181	File Extension UNL	Garmin Unlock Format
182	File Extension UNQ	ACT! 3.0 Email Message Attachment
183	File Extension UNR	Unreal Level Map
184	File Extension UNREAL	Unreal Tournament Link Format
185	File Extension UNRST	OPM Data Format
186	File Extension UNS	Visual Navigation Suite Export Or Import Settings
187	File Extension UNT	AutoCAD Unit Definition Format
188	File Extension UNUSED	Photoline 4 Defaults
189	File Extension UNV	BusinessObjects Universe
190	File Extension UNX	Unix Text Format
191	File Extension UOF	Uniform Office Document
192	File Extension UOL	PhotoImpact Clipart Image
193	File Extension UOP	Uniform Office Presentation
194	File Extension UOS	Uniform Office Spreadsheet
195	File Extension UOT	Uniform Office Document
196	File Extension UPC	Ultimate Paint Component
197	File Extension UPD	Program Update Information
198	File Extension UPDATE	ISAPI Update Format
199	File Extension UPDATR	IConomy Update Format
200	File Extension UPDF	UltraPdf Publication
201	File Extension UPF	Nokia Phone Digital Photo Format
202	File Extension UPG	Firmware Upgrade Format
203	File Extension UPI	Ulead PhotoImpact Plugin
204	File Extension UPJ	Ulead Project
205	File Extension UPK	Unreal Engine 3 Package
206	File Extension UPK0	Metro 2033 Game
207	File Extension UPK1	Metro 2033 Game Data Format
208	File Extension UPKG	Unreal Engine Package Flag Format
209	File Extension UPL	StarMoney Agent Download
210	File Extension UPLUGIN	Unreal Tournament Plugin Format
211	File Extension UPM	PenMail
212	File Extension UPO	DBASE Compiled Update Data
213	File Extension UPOI	IGO Points Of Interest Format
214	File Extension UPP	Ghostscript Uniprint Unified Printer Parameter
215	File Extension UPR	FileMaker User Spelling Dictionary
216	File Extension UPROJECT	Unreal Tournament Game Data Format
217	File Extension UPS	Microsoft Works
218	File Extension UPX	Ultimate Packer For EXecutables Format
219	File Extension UPZ	StarMoney Agent Download
220	File Extension UQM	The Ur-Quan Masters Game Data Format
221	File Extension URC	Unicenter Remote Control
222	File Extension URD	Ultra Recall Database
223	File Extension URD-JOURNAL	Ultra Recall Journal Update
224	File Extension URF	AppFace Skin
225	File Extension URL	Internet Shortcut
226	File Extension URLS	GetRight Internet Shortcuts List
227	File Extension URL_	Internet Shortcut - URL - Uniform Resource Locator
228	File Extension URN	H3DAPI Uniform Resource Name Data Format
229	File Extension URP	Universal Report
230	File Extension URQ	Review QuickChart Chart
231	File Extension URR	Uniface Signatures Format
232	File Extension URS	ControlDraw User Requirement Specifier
233	File Extension URT	Utah Raster Toolkit Format
234	File Extension US	English Language Translation
235	File Extension US?	Microsoft Word Font
236	File Extension USA	Microsoft Office Headers Format
237	File Extension USB	SiSoftware Sandra
238	File Extension USBLOG	Usb Sniffer Log Format
239	File Extension USC	USC Module Definition
240	File Extension USDX	Tom Clancys Rainbow Six: Vegas Game Data Format
241	File Extension USDZ	USDZ Augmented Reality Format Format Format
242	File Extension USECASEDIAGRAM	Microsoft Visual Studio Use Case Diagram
243	File Extension USEQ	USeq Genome Data Format
244	File Extension USER	Visual Studio Project User Options Format
245	File Extension USERKIT	DrumCore Audio Format
246	File Extension USERPROFILE	Norton Antivirus User Profile Format
247	File Extension USERSETTINGS	User Settings Format
248	File Extension USERTILE-MS	Windows 8 User Tile Format
249	File Extension USF	Nintendo 64 Music Format
250	File Extension USFLIB	Nintendo 64 Song Library
251	File Extension USG	PC-Doctor For Windows
252	File Extension USH	Creston SIMPL Windows
253	File Extension USI	UsiXML UI Description
254	File Extension USL	ProWORX Nxt USL Loadable
255	File Extension USM	USM Game Video Format
256	File Extension USP	PageMaker Printer Font
257	File Extension USR	FileMaker Pro Database Format
258	File Extension USS	WinUAE Saved State
259	File Extension UST	WiFi SiStr Exported User Theme Format
260	File Extension USTAR	Uniform Standard Tape Archive Format Format
261	File Extension USV	LG Xenon Mobile Phone Contact List Format
262	File Extension USX	Unreal Static Meshes
263	File Extension USZ	Stardock WindowBlinds SkinStudio Data Format
264	File Extension UT2	Unreal Tournament Map
265	File Extension UT2LINK	Unreal Tournament 2004 Game Data Format
266	File Extension UT2MOD	Unreal Tournament 2003/2004 Module Format
267	File Extension UT3	Unreal Tournament 3 Map Format
268	File Extension UT4MOD	Unreal Tournament 2004 Module
269	File Extension UT8	Ghost Master Language Format
270	File Extension UTB	µTBackup Backup
271	File Extension UTC	Bioware Creature Format
272	File Extension UTD	BioWare Aurora Game Engine Door
273	File Extension UTE	BioWare Aurora Game Engine Encounter
274	File Extension UTF8	Unicode UTF8-Encoded Text Document
275	File Extension UTI	Spybot - Search & Destroy Includes
276	File Extension UTL	QuickBooks Data
277	File Extension UTM	BioWare Aurora Game Engine Store
278	File Extension UTP	BioWare Aurora Game Engine Placeable Object
279	File Extension UTPART	µTorrent Unfinished Download
280	File Extension UTS	Spybot - Search & Destroy Include
281	File Extension UTT	BioWare Aurora Engine Trigger
282	File Extension UTW	Unity Whirld Format
283	File Extension UTX	Unreal Texture Package
284	File Extension UTXT	Unicode Text Format
285	File Extension UTZ	UIQ Theme Package
286	File Extension UU	Uuencoded Format
287	File Extension UUD	UUDecoded Format
288	File Extension UUE	Uuencoded Format
289	File Extension UUM	Minuum Keyboard Backup Format
290	File Extension UUS	Ultra Utility Skin
291	File Extension UV2	µVision Project
292	File Extension UVCAB	UVScreenCamera Films
293	File Extension UVF	Uncertain Value Format
294	File Extension UVKBK	Ultra Virus Killer Backup Information Format
295	File Extension UVKEY	Ultra Virus Killer License Format
296	File Extension UVKSR	Ultra Virus Killer System Repair Settings Format
297	File Extension UVN	Yamaha Tyros Audio Format
298	File Extension UVNTS	UVScreenCamera Notes
299	File Extension UVOPT	µVision Project Options Format
300	File Extension UVOPTX	µVision Configuration Format
301	File Extension UVPRJX	µVision Project Format
302	File Extension UVPROJ	µVision4 Project
303	File Extension UVPROJX	µVision Project Format
304	File Extension UVR	UVR Mesh
305	File Extension UVS	UVScreenCamera Segments
306	File Extension UVSEG	UVScreenCamera Segments
307	File Extension UVU	Movie Maker Video Data Format
308	File Extension UVW	3D Studio MAX UVW Coordinates
309	File Extension UVX	Unreal Tournament 2003 Saved Game
310	File Extension UW	Unsigned Word Audio Format
311	File Extension UWF	UltraTracker Wave Format
312	File Extension UWL	User Word List Format
313	File Extension UXDC	Microsoft Excel Data Retrieval Service Connection
314	File Extension UXF	UMLet UML EXchange Format
315	File Extension UXX	Unreal Tournament Cache
316	File Extension UXY	Barudan Embroidery Outline
317	File Extension UYVY	YUV 16-bit Image Format
318	File Extension UZ2	Unreal Tournament Compressed
319	File Extension UZE	UltimateZip Compressed Archive
320	File Extension UZED	Family Tree Builder Compressed Unicode GEDCOM Data Format
321	File Extension UZIP	FreeBSD Compressed Disk Image
322	File Extension UZY	Backdoor.Sokacaps