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System Files
System File Types - File extensions used for system files.

Extension File Description   Popularity
.386Windows Virtual Device Driver Rare
.8xuTI-83 Plus Operating System File Uncommon
.admAdministrative Template File Average
.aniWindows Animated Cursor Common
.annHelp Annotations Average
.aosARCHOS PCtablet Firmware File Uncommon
.bashrcBash Non-Interactive Login Shell File Common
.bash_historyBash History File Common
.bash_profileBash Interactive Login Shell File Common
.bioBIOS File Uncommon
.bmkHelp Bookmarks Uncommon
.bomMac OS X Bill of Materials File Uncommon
.cabWindows Cabinet File Very Common
.cgzLinux Drivers Archive Average
.clbCOM+ Catalog File Average
.cntHelp Contents File Average
.cpiCodepage Information File Average
.cplWindows Control Panel Very Common
.crashMac OS X Crash Log File Average
.curWindows Cursor Very Common
.desklinkDesktop Shortcut Average
.devWindows Device Driver File Average
.dllDynamic Link Library Very Common
.dlxRenamed DLL File Rare
.dmpWindows Memory Dump Very Common
.drvDevice Driver Very Common
.dssDCC Active Designer File Average
.dvdDOS Device Driver Average
.dycXerox Printer Driver Configuration File Rare
.emeraldEmerald Theme Uncommon
.ffaFind Fast Status File Uncommon
.fflFind Fast Document List Uncommon
.ffoFind Fast Document Properties Cache Uncommon
.ffxMicrosoft Find Fast Index Average
.fpbfMac OS X Burn Folder Common
.ftgFull Text Group Average
.ftsFull Text Search Average
.grlWindows Update Status File Rare
.grpWindows Program Manager Group Average
.hdmpWindows Heap Dump Average
.hhcHTML Help Table of Contents Average
.hhkHTML Help Index Average
.hlpWindows Help File Common
.hpjHelp Project File Average
.httHypertext Template File Average
.iclWindows Icon Library File Average
.icnsMac OS X Icon Resource File Average
.icoIcon File Common
.idxIndex File Average
.insInternet Naming Service File Average
.ion4DOS File Description Average
.itsInternet Document Set Average
.kbdKeyboard Layout Script Average
.kextMac OS X Kernel Extension Average
.keySecurity Key Common
.koLinux Kernel Module File Average
.lnkFile Shortcut Very Common
.log1Windows Registry Hive Log File Average
.log2Windows Registry Hive Log 2 File Average
.manifestWindows Visual Styles File Average
.mapimailSend To Mail Recipient Average
.mdmpWindows Minidump Average
.memParallels Desktop Memory Dump File Uncommon
.metadata_never_indexSpotlight Never Index File Uncommon
.mi4Audio Player Firmware File Average
.mobileconfigApple Mobile Configuration File Average
.mscMicrosoft Management Console Snap-in Control File Average
.mspWindows Installer Patch Common
.msstyleWindows XP Unsigned Style Uncommon
.msstylesWindows XP Style Average
.muiMultilingual User Interface File Average
.mumWindows Vista Update Package Average
.mydocsSend To My Documents Average
.nfoSystem Information File Average
.nlsMicrosoft National Language Support File Average
.ntWindows NT Startup File Average
.p7bPKCS #7 Certificate File Average
.panicKernel Panic File Uncommon
.pdrWindows Port Driver Average
.pfxPKCS #12 Certificate File Average
.pidCreative Driver File Average
.pk2Silkroad Online Game Data File Average
.polWindows Policy File Average
.ppdPostScript Printer Description File Average
.prefpaneMac OS X System Preference Pane Average
.prfWindows System File Common
.profileBash Shell Profile Common
.prtPrinter Driver File Rare
.pwlWindows Password List Average
.qvmQ Virtual Machine Rare
.rcoPlayStation Portable Resource File Uncommon
.regRegistry File Average
.rfwRockchip Firmware File Average
.rmtRouter Firmware File Average
.rufSamsung DVD and Blu-ray Player Firmware File Rare
.savedsearchSpotlight Saved Search Average
.saverMac OS X Screen Saver Average
.scfWindows Explorer Command Common
.scrWindows Screensaver Average
.sdbCustom Application Compatibility Database Uncommon
.strWindows Screensaver File Rare
.swpSwap File Average
.sysWindows System File Very Common
.sysMotorola Driver File Average
.themeMicrosoft Plus! Desktop Theme Average
.vgaVGA Display Driver Average
.vgdGeneric CADD VGA Driver Average
.vxdVirtual Device Driver Average
.wdfWindows Driver Foundation File Average
.wdgtDashboard Widget Average
.werWindows Error Report Uncommon
.wpxPrinter Description File Average
.xrm-msMicrosoft Security Certificate Uncommon


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