System Files

# File Extension Full File Name
1 File Extension $03 MS-DOS Pipe
2 File Extension 286 Microsoft Windows Virtual Device Driver
3 File Extension 2FS Puppy Linux Save State Format
4 File Extension 2GR Windows VGA Graphic Drivers
5 File Extension 32S Win32s
6 File Extension 386 Windows Virtual Device Driver
7 File Extension 3FS Puppy Linux Save State Format
8 File Extension 3~6 Windows 3.xx System
9 File Extension 500 Linux
10 File Extension 73U TI-73 Explorer Operating System Format
11 File Extension 8XU TI-83 Plus Operating System Format
12 File Extension AAD FreeBSD
13 File Extension ACCESS Java Access Control
14 File Extension ACCT IBM AIX System
15 File Extension ADM Administrative Template Format
16 File Extension ADML Microsoft Administrative Language-specific XML Template Format
17 File Extension ADMX Group Policy Administrative Template Format
18 File Extension ADUPS Google Android Data Format
19 File Extension AIX IBM AIX
20 File Extension AML Microsoft Assistance Markup Language
21 File Extension ANI Animated Cursor
22 File Extension ANN Help Annotations
23 File Extension AOS ARCHOS PCtablet Firmware Format
24 File Extension APDISK Apple Mac OS X Related
25 File Extension APPLEDOUBLE Apple AppleDouble Resource
26 File Extension APPLE_PARTITION_MAP Apple Partition Scheme
27 File Extension AQL AOL DLL
28 File Extension ASEC Android Secure Application Format
29 File Extension ATAHD ATA Hard Drive Flag Format
30 File Extension AUG Red Hat Linux Shellvars
31 File Extension AUTOMATICDESTINATIONS-MS Windows Jump List Format
32 File Extension BADA Samsung Bada Data Format
33 File Extension BASHRC Bash Non-Interactive Login Shell Format
34 File Extension BASH_HISTORY Bash History Format
35 File Extension BASH_PROFILE Bash Interactive Login Shell Format
36 File Extension BBFW ITunes Firmware
37 File Extension BCD Windows Boot Configuration Data Format
38 File Extension BK2 Windows Indexing Service Data Format
39 File Extension BLF Microsoft Windows Vista And Windows 7 Registry Format
40 File Extension BNR Nintento Wii Homebrew
41 File Extension BOM Mac OS X Bill Of Materials Format
42 File Extension BOOTEFISIGNATURE Bootefisignature Mac OS X System
43 File Extension BRIDGESUPPORT Bridgesupport Mac OS X Format Extension
44 File Extension BSDIFF Cygwin
45 File Extension BUD Binary Printer Description Format
46 File Extension BZI Dariks Boot And Nuke Kernel Data Format
47 File Extension B~K Microsoft Windows 3.x Data Format
48 File Extension C32 Syslinux COM32 Module
49 File Extension CAB Windows Cabinet Format
50 File Extension CACHEDUMP Microsoft Windows System Data Format
51 File Extension CAT Microsoft Security Catalog Format
52 File Extension CB Microsoft Clean Boot
53 File Extension CDMP WCS Device Model Profile
54 File Extension CGK BlueSoleil
55 File Extension CGZ Linux Drivers Archive
56 File Extension CHS Windows Chinese Noise-Word List Format
57 File Extension CNS Windows 2000 Client Connection Manager Export Format
58 File Extension CNT Help Contents Format
59 File Extension COMPONENTS Mac OS X System
60 File Extension CONFIGPROFILE Apple Configuration Profile
61 File Extension CPL Windows Control Panel Item
62 File Extension CPQ Compaq OEM Disc Configuration Format
63 File Extension CQ SYSGEN Replacement Data Format
64 File Extension CRASH Mac OS X Crash Log Format
65 File Extension CRMLOG Microsoft Windows CRM Log
66 File Extension CTFSYS OS X Mach Kernel System
67 File Extension CUR Windows Cursor
68 File Extension DAT_TUREG_OLD Windows Registry
69 File Extension DBFSEVENTSD Mac OS X Data Format
70 File Extension DDZ Adaptec Unix Driver
71 File Extension DESKLINK Desktop Shortcut
72 File Extension DESKTHEMEPACK Windows 8 Desktop Theme Pack Format
73 File Extension DEV Windows Device Driver Format
74 File Extension DEVICEMANIFEST-MS Microsoft Windows Device Metadata
75 File Extension DFU IOS DFU Format
76 File Extension DIAGCAB Troubleshooting Pack Cabinet Format
77 File Extension DIAGCFG Troubleshooting Pack Configuration Format
78 File Extension DIAGPKG Troubleshooting Pack Format
79 File Extension DIMAX DiMAX Firmware Image Format
80 File Extension DIT Active Directory Information Tree Format
81 File Extension DLL Dynamic Link Library
82 File Extension DLL_1029 Microsoft Windows Dynamic Link Library Format
83 File Extension DMP Windows Memory Dump
84 File Extension DO7 DOS 7
85 File Extension DOCUMENTREVISIONS-V100 MacOS (OS X) Data Format
86 File Extension DOH Geoworks GEOS Dependency Information
87 File Extension DOS WIN95/ DOS 7 System
88 File Extension DRPM Delta RPM Format
89 File Extension DRV Device Driver
90 File Extension DYC Xerox Printer Driver Configuration Format
91 File Extension EBD Windows EBD System Format
92 File Extension EDJ Enlightenment Theme Format
93 File Extension EFI Extensible Firmware Interface Format
94 File Extension EFIRES EFI Image Format
95 File Extension EMERALD Emerald Theme
96 File Extension EMM Expanded Memory Manager Data Format
97 File Extension EQUIV IBM AIX System Format.
98 File Extension ESN Windows XP System32
99 File Extension ETL Microsoft Event Trace Log Format
100 File Extension EVT Windows Event Viewer Log Format
101 File Extension EVTX Windows 7 Event Log Format
102 File Extension EXT2 Linux Second Extended System
103 File Extension EXT4 Fourth Extended Formatsystem Format
104 File Extension FAILUREREQUESTS MacOS (OS X) Data Format
105 File Extension FFA Find Fast Status Format
106 File Extension FFL Find Fast Document List
107 File Extension FFO Find Fast Document Properties Cache
108 File Extension FGDUMP-LOG Microsoft Windows Fgdump Data Format
109 File Extension FOLDER Microsoft Windows Explorer Folder
110 File Extension FOTA Firmware Over-the-Air Format
111 File Extension FPBF Mac OS X Burn Folder
112 File Extension FSEVENTSD MAC OS X
113 File Extension FSTAB File System Table
114 File Extension FTG Full Text Group
115 File Extension FWL FileWrangler EXE Library
116 File Extension GMMP WCS Gamut Map Model Profile
117 File Extension GRL Windows Update Status Format
118 File Extension GROUP Windows Contacts Group Format
119 File Extension H1C Windows Vista Format Related To Assistance Platform (AP) Help
120 File Extension H1F Microsoft Windows Assistance Platform Client Help
121 File Extension H1K Keyword Index - Microsoft Windows Assistance Platform Client Help Related
122 File Extension H1S Windows Assistance Platform Help Format
123 File Extension H1T Microsoft Windows Assistance Platform Client Help Related
124 File Extension H1V Task Metadata - Microsoft Windows Assistance Platform Client Help Related
125 File Extension HDMP Windows Heap Dump
126 File Extension HELP Mac OS X Help Book
127 File Extension HHC HTML Help Table Of Contents
128 File Extension HHK HTML Help Index
129 File Extension HIV Windows Registry Hive Format
130 File Extension HLP Windows Help Format
131 File Extension HPC System Dynamic Library
132 File Extension HPFS OS/2 High Performance Format System
133 File Extension HPJ Help Project Format
134 File Extension HSH Windows Catalog Search Index Format
135 File Extension HTT Hypertext Template Format
136 File Extension HTW Windows
137 File Extension HV Microsoft Windows Mobile Hive
138 File Extension HX1 Microsoft Windows Data Format
139 File Extension HXI Microsoft Help Compiled Storage
140 File Extension IA64 HP-UX
141 File Extension ICL Windows Icon Library Format
142 File Extension ICNS Mac OS X Icon Resource Format
143 File Extension ICO Icon Format
144 File Extension ICONPACKAGE IconPackager Theme Format
145 File Extension IDENTIFIER Microsoft Windows Zone Identifier
146 File Extension IDX_DLL Microsoft Office IDX_DLL
147 File Extension IFW INTUS Firmware Format
148 File Extension IM4P Apple IOS IMG4 Payload Data Format
149 File Extension IME Windows Input Method Editor Format
150 File Extension IMG3 IPhone IMG3 Format
151 File Extension INA MS-DOS
152 File Extension INF_LOC Windows Driver Information Cache Format
153 File Extension INSTALL_BACKUP AVG Shell Extension Module
154 File Extension INTERNETCONNECT Apple Internet Connect Document
155 File Extension ION File Description Format
156 File Extension IOPLIST Mac OS X IOPLIST Format
157 File Extension IPOD Rockbox Firmware Format
158 File Extension IPTHEME IconPackager Raw Theme Format
159 File Extension IRIX6 Irix 6
160 File Extension ISWP Apple ITunes IOS Firmware Update
161 File Extension ITEMDATA-MS Windows 8 Start Screen Item Data Format
162 File Extension IUS InfoTMIC Firmware Update Format
163 File Extension JFS Linux/Unix Journaling System
164 File Extension JLB PAC Mate BX Keyboard Driver
165 File Extension JOB Windows Task Scheduler Job Format
166 File Extension JOURNAL_INFO_BLOCK Apple Mac OS Xsystem
167 File Extension JPN Windows Japanese Noise-Word List Format
168 File Extension K48 Apple IOS Kernel Cache
169 File Extension KBD Keyboard Layout Script
170 File Extension KEXT Mac OS X Kernel Extension
171 File Extension KO Linux Kernel Module Format
172 File Extension KOR Windows Korean Noise-Words List Format
173 File Extension LE Le Mac OS X
174 File Extension LFS Samsung Phone Params.lfs Format
175 File Extension LGS Microsoft Windows Application Log
176 File Extension LIBRARY-MS Windows Library Description Format
177 File Extension LLS Windows System
178 File Extension LN UNIX Lint
179 File Extension LNK Windows Format Shortcut
180 File Extension LOCALIZED MAC OS X
181 File Extension LOCATION Microsoft Windows 10 Registry Data Format
182 File Extension LOCKFILE Mac OS X PLIST Lock Format
183 File Extension LOG1 Windows Registry Hive Log Format
184 File Extension LOG2 Windows Registry Hive Log 2 Format
185 File Extension LPD Lookout Protocol Driver Format
186 File Extension LS_ Unix Ls Directory
187 File Extension LTN CD-ROM Driver Format
188 File Extension MANIFEST Windows Application Manifest Format
189 File Extension MAPIMAIL Send To Mail Recipient
190 File Extension MARKER Microsoft Windows 10 System Data Format
191 File Extension MDIMPORTER Spotlight Importer Setting
192 File Extension MDMP Windows Minidump
193 File Extension METADATA_NEVER_INDEX Spotlight Never Index Format
194 File Extension MI4 Audio Player Firmware Format
195 File Extension MIGTABLE Microsoft Windows Data Format
196 File Extension MKEXT Mac OS X Mach Kernel Extension Memory Cache
197 File Extension MLC Microsoft Language Interface Pack
198 File Extension MOBILECONFIG Apple Mobile Configuration Format
199 File Extension MOJITO Limewire Kademlia
200 File Extension MONITORPANEL Apple Mac OS X Display Panel Extension
201 File Extension MPS_ MPW Shell
202 File Extension MQ Microsoft Windows Message Data Format
203 File Extension MSC Microsoft Management Console Snap-in Control Format
204 File Extension MSDM Microsoft Windows
205 File Extension MSP Windows Installer Patch
206 File Extension MSSTYLE Windows XP Unsigned Style
207 File Extension MSSTYLES Windows XP Style
208 File Extension MTZ MIUI Theme
209 File Extension MUI Multilingual User Interface Format
210 File Extension MUIMANIFEST Microsoft Windows Multilingual User Interface
211 File Extension MUI_CCCD5AE0 Hid User Library
212 File Extension MUM Windows Vista Update Package
213 File Extension MYDOCS Send To My Documents
214 File Extension N81 Apple IOS Kernel Cache
215 File Extension N90 Apple IOS Kernel Cache
216 File Extension N90AP IPhone Jailbreak Firmware
217 File Extension NBH ROM Update Utility Image Format
218 File Extension NETWORKCONNECT Apple Network Connect Document
219 File Extension NLS Microsoft National Language Support Format
220 File Extension NOS JDOS System
221 File Extension NOT_TERMINATED Mac OS X Audit Log
222 File Extension NOVS Novell NetWare Control Center
223 File Extension NT Windows NT Startup Format
224 File Extension NTFS NTFS Partition Format
225 File Extension NU4 Norton Utilities DLL Root
226 File Extension NXS AdaOS Support Module Format
227 File Extension OS2 Os2 System
228 File Extension OSAX FindFile OSAX Mac Format Type
229 File Extension OSINSTALLMESSAGES MacOS System Data Format
230 File Extension OV1 Overlay
231 File Extension OV3 Overlay
232 File Extension OV4 Overlay
233 File Extension OV5 Overlay
234 File Extension P5X Windows System
235 File Extension PANIC Kernel Panic Format
236 File Extension PAYLOAD Microsoft Windows Mobile
237 File Extension PCI PCI Miniport
238 File Extension PDR Windows Port Driver
239 File Extension PF Windows Prefetch Format
240 File Extension PFX PKCS #12 Certificate Format
241 File Extension PK2 Silkroad Online Game Data Format
242 File Extension PNF Precompiled INF Format
243 File Extension PPD PostScript Printer Description Format
244 File Extension PR2 DBase IV Printer Driver
245 File Extension PREFPANE Mac OS X System Preference Pane
246 File Extension PRINTEREXPORT Windows Printer Migration Format
247 File Extension PROFILE Bash Shell Profile
248 File Extension PROVISIONPROFILE Apple Provision Profile
249 File Extension PWL Windows Password List
250 File Extension PXE Linux, Unix Network Bootable
251 File Extension QFILTER Mac OS X ColorSync Filter
252 File Extension QKY Quirky Kernel
253 File Extension QTS QuickTime System
254 File Extension QUICKTIMECOMPONENTS Mac OS X System
255 File Extension RC1 Samsung Mobile Device Firmware Format
256 File Extension RCO PlayStation Portable Resource Format
257 File Extension RDZ Mandrake Linux Install
258 File Extension REG Registry Format
259 File Extension REGTRANS-MS Registry Transaction Log Format
260 File Extension RESTORELIST Microsoft Windows Format System Permission Format
261 File Extension RFW Rockchip Firmware Format
262 File Extension RGU Microsoft Windows Mobile Registry Entry
263 File Extension RIO IBM AIX System
264 File Extension RISCOS Acorn RISC OS
265 File Extension RMT Router Firmware Format
266 File Extension RRA Windows Installer Temporary Format Format
267 File Extension RSQ IBM 4690 Operating System​
268 File Extension RTP Microsoft Software Update Format
269 File Extension RWM Windows Imaging Resource Only
270 File Extension RX MS-DOS 7
271 File Extension SAVEDSEARCH Spotlight Saved Search
272 File Extension SAVER Mac OS X Screen Saver
273 File Extension SBF Android System Format
274 File Extension SCAP EFI Firmware Format
275 File Extension SCF Windows Explorer Command
276 File Extension SCHEMAS GConf Schema Definition Format
277 File Extension SCR Windows Screensaver
278 File Extension SEARCHCONNECTOR-MS Windows Search Connector Format
279 File Extension SEARCHINDEXCACHE Mac OS X Cache
280 File Extension SERVICE Mac OS X Service Application
281 File Extension SF0 Windows Sytem Check
282 File Extension SFCACHE ReadyBoost Cache Format
283 File Extension SHA Unix SHAR Archive
284 File Extension SHD Windows Print Job Shadow Format
285 File Extension SHSH IPhone/iPod Touch SHSH Blob Format
286 File Extension SO0 Unix Shared Library Format
287 File Extension SP3 Microsoft Windows XP With Service Pack 3 Installation Format
288 File Extension SPL Windows Print Spool Format
289 File Extension SPREPORTER Mac OS X System Profiler Reporter
290 File Extension SQM Service Quality Monitoring Format
291 File Extension SUPPORTED MAC OS X
292 File Extension SYS Windows System Format
293 File Extension TDZ Drobo Firmware Format
294 File Extension THA Windows Thai Noise-Words List Format
295 File Extension THEME Microsoft Plus! Desktop Theme
296 File Extension TNR GPS Pathfinder ProXR/XRS Firmware
297 File Extension TRX_DLL Windows Startup Format
298 File Extension UAQ Microsoft Windows Action Queue
299 File Extension UCE Windows UCE System Format
300 File Extension VCN NCDrive Vacon NX System Software
301 File Extension VET VET Antivirus System
302 File Extension VGA VGA Display Driver
303 File Extension VGD Generic CADD VGA Driver
304 File Extension VMLT VMLF Related Data Format
305 File Extension VRS Corel WordPerfect Video Resource Device Driver
306 File Extension VTD Microsoft Windows Custom Virtual Device Driver
307 File Extension VXD Virtual Device Driver
308 File Extension VX_ Compressed Virtual Device Driver Format
309 File Extension WDGT Dashboard Widget
310 File Extension WEBPNP Web Point And Print Format
311 File Extension WER Windows Error Report
312 File Extension WGZ S60 Web Runtime Widget Package
313 File Extension WRS Corel WordPerfect Windows Printer Driver
314 File Extension WSS Microsoft Windows Sound System
315 File Extension X86 Microsoft Office Dynamic Link Library Format
316 File Extension XMO Adobe Authorware Movie Driver
317 File Extension XMS Microsoft EXtended Memory Specification
318 File Extension XP WindowBlinds Temporary Format
319 File Extension XRM-MS Microsoft Security Certificate
320 File Extension ZEX ZOOM MRS-802 System
321 File Extension ZONEIDENTIFIER Windows Zone Identifier Format
322 File Extension _DL Dynamic Link Library DLL Format Form
323 File Extension _VTI_BIN SharePoint