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System Files
The System Files category includes files related to Mac, Windows, and Linux operating systems. Some examples include system libraries, icons, themes, and device drivers. Files output by the system are also included in this category.
Common system file extensions include .DLL, .DRV, .SYS, and .CAB.
| File Extension | File Type | Popularity |
|---|---|---|
| .HIV | Windows Registry Hive File | 137 |
| .BASH_HISTORY | Bash History File | 139 |
| .MAPIMAIL | Send To Mail Recipient | 150 |
| .73U | TI-73 Explorer Operating System File | 150 |
| .ADMX | Group Policy Administrative Template File | 153 |
| .EBD | Windows EBD System File | 155 |
| .REG | Registry File | 160 |
| .ICONPACKAGE | IconPackager Theme File | 160 |
| .REGTRANS-MS | Registry Transaction Log File | 162 |
| .HTT | Hypertext Template File | 165 |
| .CUR | Windows Cursor | 166 |
| .SEARCHCONNECTOR-MS | Windows Search Connector File | 167 |
| .AML | ACPI Machine Language File | 167 |
| .PCK | System Center Configuration Manager Package File | 169 |
| .DLL | Dynamic Link Library | 174 |
| .DESKTHEMEPACK | Windows 8 Desktop Theme Pack File | 175 |
| .ANI | Windows Animated Cursor | 175 |
| .DESKLINK | Desktop Shortcut | 176 |
| .DVD | DOS Device Driver | 177 |
| .LNK | Windows Shortcut | 177 |
| .FTF | FlashTool Firmware File | 178 |
| .SCR | Windows Screensaver | 179 |
| .SDT | Siemens Desktop Theme File | 179 |
| .CLB | COM+ Catalog File | 180 |
| .DMP | Windows Memory Dump | 180 |
| .ION | File Description File | 182 |
| .CPL | Windows Control Panel Item | 182 |
| .PK2 | Silkroad Online Game Data File | 182 |
| .NFO | System Information File | 183 |
| .INF_LOC | Windows Driver Information Cache File | 183 |
| .MDMP | Windows Minidump | 184 |
| .ICNS | macOS Icon Resource File | 185 |
| .CAB | Windows Cabinet File | 185 |
| .NT | Windows NT Startup File | 186 |
| .LIBRARY-MS | Windows Library Description File | 186 |
| .LOG1 | Windows Registry Hive Log File | 187 |
| .ZONE.IDENTIFIER | Windows Zone Identifier File | 187 |
| .ICO | Icon File | 187 |
| .WDGT | Dashboard Widget | 187 |
| .SYS | Windows System File | 189 |
| .QVM | Q Virtual Machine | 189 |
| .MSC | Microsoft Management Console Snap-in Control File | 190 |
| .ASEC | Android Secure Application File | 191 |
| .SFCACHE | ReadyBoost Cache File | 192 |
| .RC1 | Samsung Mobile Device Firmware File | 192 |
| .THEME | Microsoft Plus! Desktop Theme | 192 |
| .MANIFEST | Windows Application Manifest File | 192 |
| .000 | Indexing Service Data File | 192 |
| .PROP | Android Build Properties File | 195 |
| .PAT | DiskStation Manager Installation File | 196 |
| .DAT | Windows Registry Hive File | 199 |
| .RMT | Router Firmware File | 200 |
| .MI4 | Audio Player Firmware File | 200 |
| .EDJ | Enlightenment Theme File | 200 |
| .PWL | Windows Password List | 200 |
| .MLC | Microsoft Language Interface Pack | 200 |
| .BASHRC | Bash Non-Interactive Login Shell File | 200 |
| .CI | Windows Content Indexer Catalog File | 200 |
| .CGZ | Linux Drivers Archive | 200 |
| .VGA | VGA Display Driver | 200 |
| .VX_ | Compressed Virtual Device Driver File | 200 |
| .FFX | Microsoft Find Fast Index | 200 |
| .FOTA | Firmware Over-the-Air File | 200 |
| .H1S | Windows Assistance Platform Help File | 200 |
| .DRPM | Delta RPM File | 200 |
| .CANNEDSEARCH | Apple Predefined Search | 200 |
| .BIN | Router Firmware File | 201 |
| .MUI | Multilingual User Interface File | 201 |
| .ETL | Microsoft Event Trace Log File | 202 |
| .SYS | Motorola Driver File | 202 |
| .PNF | Precompiled INF File | 203 |
| .MOBILECONFIG | Apple Mobile Configuration File | 208 |
| .PROFILE | Bash Shell Profile | 208 |
| .BASH_PROFILE | Bash Interactive Login Shell File | 209 |
| .BCD | Windows Boot Configuration Data File | 209 |
| .3FS | Puppy Linux Save State File | 209 |
| .WDF | Windows Driver Foundation File | 210 |
| .MTZ | MIUI Theme | 211 |
| .BIO | BIOS File | 212 |
| .MSSTYLES | Windows XP Style | 213 |
| .0 | Shared Library Link File | 215 |
| .LFS | Samsung Phone params.lfs File | 217 |
| .BOM | Mac OS X Bill of Materials File | 217 |
| .SDB | Custom Application Compatibility Database | 217 |
| .C32 | Syslinux COM32 Module | 218 |
| .CM0013 | Samsung Smart TV Index File | 219 |
| .EFI | Extensible Firmware Interface File | 220 |
| .HHK | HTML Help Index | 220 |
| .PDR | Windows Port Driver | 220 |
| .DEV | Windows Device Driver File | 220 |
| .WEBPNP | Web Point and Print File | 220 |
| .DIMAX | DiMAX Firmware Image File | 220 |
| .MBR | Master Boot Record File | 220 |
| .GROUP | Windows Contacts Group File | 220 |
| .208 | ASUS Notebook BIOS 208 Update File | 221 |
| .MSP | Windows Installer Patch | 221 |
| .ELF | Executable and Linkable Format File | 222 |
| .ADM | Administrative Template File | 222 |
| .PIT | Samsung Phone Firmware File | 223 |
| .DIAGCAB | Troubleshooting Pack Cabinet File | 223 |
| .INS | Internet Naming Service File | 224 |
| .JOB | Windows Task Scheduler Job File | 225 |
| .POL | Windows Policy File | 228 |
| .LOG2 | Windows Registry Hive Log 2 File | 231 |
| .DRV | Device Driver | 231 |
| .IMG3 | iPhone IMG3 File | 233 |
| .IME | Windows Input Method Editor File | 233 |
| .SAVEDSEARCH | Spotlight Saved Search | 233 |
| .PPD | PostScript Printer Description File | 235 |
| .CNT | Help Contents File | 237 |
| .DTHUMB | Android Data Thumbnail | 238 |
| .VXD | Virtual Device Driver | 238 |
| .HCD | Samsung Android Firmware File | 238 |
| .CAT | Windows Catalog File | 239 |
| .SBF | Android System File | 240 |
| .WPX | Printer Description File | 240 |
| .DIT | Active Directory Information Tree File | 240 |
| .386 | Windows Virtual Device Driver | 241 |
| .FIRM | Boot9Strap 3DS Firmware File | 243 |
| .8XU | TI-83 and TI-84 Plus Operating System File | 244 |
| .PRF | Windows System File | 244 |
| .KEY | Security Key | 246 |
| .LST | GRUB Boot List File | 246 |
| .ADML | Group Policy Language-Specific Administrative Template | 247 |
| .CPQ | Compaq OEM Disc Configuration File | 250 |
| .FFA | Find Fast Status File | 250 |
| .AOS | ARCHOS PCtablet Firmware File | 250 |
| .FFO | Find Fast Document Properties Cache | 250 |
| .MOD | GRUB Module | 250 |
| .GRP | Windows Program Manager Group | 250 |
| .8CU | TI-84 Plus C Operating System File | 250 |
| .CHG | Windows Net Logon File | 250 |
| .TDZ | Drobo Firmware File | 250 |
| .CMO | ASUS BIOS File | 250 |
| .TIMER | Systemd Unit Configuration File | 250 |
| .SCHEMAS | GConf Schema Definition File | 250 |
| .SBN | Cisco IP Phone Firmware File | 250 |
| .IDX | Index File | 250 |
| .SWP | Swap File | 250 |
| .ITEMDATA-MS | Windows 8 Start Screen Item Data File | 250 |
| .HDMP | Windows Heap Dump | 250 |
| .SHSH | iPhone/iPod Touch SHSH Blob File | 250 |
| .SQM | Service Quality Monitoring File | 250 |
| .HLP | Windows Help File | 252 |
| .FLG | Puppy Linux Partition Flag File | 255 |
| .DFU | iOS DFU File | 256 |
| .MBN | Multi Boot Image | 256 |
| .ODEX | Optimized Dalvik Executable | 258 |
| .SAVER | Mac OS X Screen Saver | 260 |
| .CHK | Netgear Router Firmware File | 261 |
| .FX | ReadyBoot Trace File | 262 |
| .SHD | Windows Print Job Shadow File | 262 |
| .BLF | CLFS Base Log File | 262 |
| .2FS | Puppy Linux Save State File | 264 |
| .KO | Linux Kernel Module File | 265 |
| .TRX_DLL | Windows Startup File | 267 |
| .THA | Windows Thai Noise-Words List File | 267 |
| .PRO | TurboIntegrator Process Definition File | 267 |
| .PRINTEREXPORT | Windows Printer Migration File | 267 |
| .FPBF | Mac OS X Burn Folder | 267 |
| .ICL | Windows Icon Library File | 267 |
| .PFX | PKCS #12 Certificate File | 269 |
| .WER | Windows Error Report | 271 |
| .NB0 | Device Boot Loader Image | 271 |
| .ADV | Audio Driver File | 271 |
| .CHT | Windows Chinese Traditional Noise-Word List File | 271 |
| .HHC | HTML Help Table of Contents | 273 |
| .FL1 | Lenovo BIOS Update File | 275 |
| .ATAHD | ATA Hard Drive Flag File | 275 |
| .MSSTYLE | Windows XP Unsigned Style | 275 |
| .NBH | ROM Update Utility Image File | 275 |
| .CPI | Codepage Information File | 277 |
| .PS2 | Microsoft Search Catalog Index File | 278 |
| .PRT | Printer Driver File | 278 |
| .IM4P | IMG4 Payload File | 280 |
| .KS | Kickstart File | 280 |
| .MUI_CCCD5AE0 | Hid User Library | 280 |
| .RUF | Samsung DVD and Blu-ray Player Firmware File | 281 |
| .CRASH | Mac OS X Crash Log File | 283 |
| .STR | Windows Screensaver File | 285 |
| .KEXT | Mac OS X Kernel Extension | 286 |
| .XRM-MS | Microsoft Security Certificate | 286 |
| .MUM | Windows Vista Update Package | 286 |
| .CUSTOMDESTINATIONS-MS | Windows 7 Jump List File | 287 |
| .IOPLIST | Mac OS X IOPLIST File | 300 |
| .XFB | Xserve RAID Firmware Binary File | 300 |
| .RS | Windows Rating System File | 300 |
| .UCE | Windows UCE System File | 300 |
| .CHS | Windows Chinese Noise-Word List File | 300 |
| .PID | Creative Driver File | 300 |
| .HSH | Windows Catalog Search Index File | 300 |
| .SB | Slax Bundle | 300 |
| .FID | Microsoft Catalog Indexing Service File | 300 |
| .BK2 | Windows Indexing Service Data File | 300 |
| .PROVISIONPROFILE | Apple Provision Profile | 300 |
| .IFW | INTUS Firmware File | 300 |
| .MEM | Parallels Desktop Memory Dump File | 300 |
| .PREFPANE | Mac OS X System Preference Pane | 300 |
| .HPJ | Help Project File | 300 |
| .RFW | Rockchip Firmware File | 300 |
| .SPL | Windows Print Spool File | 300 |
| .LOCKFILE | Mac OS X PLIST Lock File | 300 |
| .EFIRES | EFI Image File | 300 |
| .CONFIGPROFILE | Apple Configuration Profile | 300 |
| .IDI | EVA Controller Event Log | 300 |
| .ESCOPY | ES File Explorer File Manager Temporary File | 300 |
| .SERVICE | Systemd Service Unit File | 300 |
| .FTS | Full Text Search | 300 |
| .METADATA_NEVER_INDEX | Spotlight Never Index File | 300 |
| .TA | Sony Firmware File | 300 |
| .GMMP | WCS Gamut Map Model Profile | 300 |
| .LPD | LPD Daemon Print Permissions File | 300 |
| .CAP | ASUS BIOS Update File | 306 |
| .CPR | Windows Phone Display Settings File | 309 |
| .SO.0 | Unix Shared Library File | 314 |
| .GRL | Windows Update Status File | 314 |
| .SCF | Windows Explorer Command | 315 |
| .THUMBNAILS | Android Thumbnails Folder | 317 |
| .VGD | Generic CADD VGA Driver | 317 |
| .NLS | Microsoft National Language Support File | 320 |
| .BMK | Help Bookmarks | 320 |
| .AUTOMATICDESTINATIONS-MS | Windows Jump List File | 322 |
| .KBD | Keyboard Layout Script | 325 |
| .DEVICEMETADATA-MS | Device Metadata Package | 325 |
| .DYC | Xerox Printer Driver Configuration File | 325 |
| .ME | Puppy Linux Partition Flag File | 329 |
| .PS1 | Microsoft Indexing Service Data File | 330 |
| .EVTX | Windows 7 Event Log File | 331 |
| .QKY | Quirky Kernel | 333 |
| .PPM | Post Programmable Memory File | 333 |
| .DSS | DCC Active Designer File | 340 |
| .NTFS | NTFS Partition File | 340 |
| .WPH | Phoenix BIOS File | 350 |
| .JPN | Windows Japanese Noise-Word List File | 350 |
| .MYDOCS | Send To My Documents | 350 |
| .LPD | Lookout Protocol Driver File | 350 |
| .IPTHEME | IconPackager Raw Theme File | 350 |
| .RCO | PlayStation Portable Resource File | 350 |
| .IPOD | Rockbox Firmware File | 350 |
| .TRASHES | macOS USB Flash Drive Trash Folder | 360 |
| .BUD | Binary Printer Description File | 360 |
| .WGZ | S60 Web Runtime Widget Package | 367 |
| .DLX | Renamed DLL File | 367 |
| .SPX | System Profiler XML Report | 375 |
| .BK1 | Windows Indexing Service File | 380 |
| .SCAP | EFI Firmware File | 380 |
| .IUS | InfoTMIC Firmware Update File | 400 |
| .PANIC | Kernel Panic File | 400 |
| .EMERALD | Emerald Theme | 400 |
| .MMV | Magnex Firmware File | 400 |
| .FTG | Full Text Group | 400 |
| .SIN | Sony Xperia Firmware File | 400 |
| .DIAGCFG | Troubleshooting Pack Configuration File | 400 |
| .EVT | Windows Event Viewer Log File | 400 |
| .REGLNK | Registry Editor Shortcut File | 400 |
| .HVE | Windows Registry Hive File | 400 |
| .FFL | Find Fast Document List | 400 |
| .KOR | Windows Korean Noise-Words List File | 400 |
| .NETWORKCONNECT | Apple Network Connect Document | 400 |
| .CDMP | WCS Device Model Profile | 400 |
| .ANN | Help Annotations | 420 |
| .HELP | Mac OS X Help Book | 437 |
| .DIAGPKG | Troubleshooting Pack File | 450 |
| .RC2 | Samsung Mobile Device Firmware File | 450 |
| .INTERNETCONNECT | Apple Internet Connect Document | 450 |
| .ITS | Internet Document Set | 500 |
| .RVP | Sharp Blu-ray Player Firmware File | 500 |
All Categories
Common File Types
Text Files
Data Files
Audio Files
Video Files
eBook Files
3D Images
Raster Images
Vector Images
Camera Raw Images
Page Layout Files
Spreadsheet Files
Database Files
Executable Files
Game Files
CAD Files
GIS Files
Web Files
Plugin Files
Font Files
System Files
Settings Files
Encoded Files
Compressed Files
Disk Images
Developer Files
Backup Files
Misc Files