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