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