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