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.

Extension File Type Popularity
.ADMXGroup Policy Administrative Template File
.RMTRouter Firmware File
.REGRegistry File
.VGAVGA Display Driver
.AMLACPI Machine Language File
.CURWindows Cursor Image
.ITEMDATA-MSWindows 8 Start Screen Item Data File
.ANIWindows Animated Cursor
.CLBCOM+ Catalog File
.WDGTDashboard Widget
.SERVICESystemd Service Unit File
.REGTRANS-MSRegistry Transaction Log File
.NTWindows NT Startup File
.ICNSmacOS Icon Resource
.DLLDynamic Link Library
.DESKTHEMEPACKWindows 8 Desktop Theme Pack File
.INF_LOCWindows Driver Information Cache File
.ICONPACKAGEIconPackager Theme File
.SEARCHCONNECTOR-MSWindows Search Connector File
.HVEWindows Registry Hive File
.PK2Silkroad Online Game Data File
.DVDDOS Device Driver
.DMPWindows Memory Dump
.DESKLINKDesktop Shortcut
.LNKWindows Shortcut
.THEMEMicrosoft Plus! Desktop Theme
.HIVWindows Registry Hive File
.VX_Compressed Virtual Device Driver File
.QVMQ Virtual Machine
.MDMPWindows Minidump
.EBDWindows EBD System File
.HTTHypertext Template
.SYSWindows System File
.ELFExecutable and Linkable Format File
.LIBRARY-MSWindows Library Description File
.PCKSystem Center Configuration Manager Package File
.SFCACHEReadyBoost Cache File
.ASECAndroid Secure Application File
.ICOIcon File
.FIRMBoot9Strap 3DS Firmware File
.IONFile Description File
.RC1Samsung Mobile Device Firmware File
.FTFFlashTool Firmware File
.MANIFESTWindows Application Manifest File
.PROPAndroid Build Properties File
.NFOSystem Information File
.000Indexing Service Data File
.MUIMultilingual User Interface File
.ETLMicrosoft Event Trace Log File
.BINRouter Firmware File
.TIMERSystemd Unit Configuration File
.MAPIMAILSend To Mail Recipient
.BASH_HISTORYBash History File
.CGZLinux Drivers Archive
.PREFPANEMac OS X System Preference Pane
.ZONE.IDENTIFIERWindows Zone Identifier File
.CIWindows Content Indexer Catalog File
.MSCMicrosoft Management Console Snap-in Control File
.EDJEnlightenment Theme File
.MENUmacOS Menu Extra
.PWLWindows Password List
.H1SWindows Assistance Platform Help File
.DATWindows Registry Hive File
.CM0013Samsung Smart TV Index File
.ADMAdministrative Template File
.SCRWindows Screensaver
.EFIExtensible Firmware Interface File
.FXReadyBoot Trace File
.LOG1Windows Registry Hive Log File
.CABWindows Cabinet File
.WDFWindows Driver Foundation File
.BASHRCBash Non-Interactive Login Shell File
.LFSSamsung Phone params.lfs File
.MLCMicrosoft Language Interface Pack
.SDBCustom Application Compatibility Database
.MSSTYLESWindows XP Style
.FOTAFirmware Over-the-Air File
.PITSamsung Phone Firmware File
.MOBILECONFIGApple Mobile Configuration File
.C32Syslinux COM32 Module
.SYSMotorola Cell Phone Driver
.PNFPrecompiled INF File
.TRX_DLLWindows Startup File
.73UTI-73 Explorer Operating System File
.SBNCisco IP Phone Firmware File
.HHKHTML Help Index
.WEBPNPWeb Point and Print File
.0Shared Library Link File
.208ASUS Notebook BIOS 208 Update File
.BCDWindows Boot Configuration Data File
.DRVDevice Driver
.BASH_PROFILEBash Interactive Login Shell File
.PDRWindows Port Driver
.DITActive Directory Information Tree File
.DTHUMBAndroid Data Thumbnail
.MBRMaster Boot Record File
.INSInternet Naming Service File
.IMG3iPhone IMG3 File
.PLASMOIDPlasma Widget
.MUI_CCCD5AE0Hid User Library
.3FSPuppy Linux Save State File
.PROTurboIntegrator Process Definition File
.DIAGCABTroubleshooting Pack Cabinet File
.HDMPWindows Heap Dump
.CATWindows Catalog File
.POLWindows Policy File
.DRPMDelta RPM File
.PPDPostScript Printer Description File
.AOSARCHOS PCtablet Firmware File
.SHDWindows Print Job Shadow File
.NB0Device Boot Loader Image
.SDTSiemens Desktop Theme File
.CPLWindows Control Panel Item
.PATDiskStation Manager Installation File
.AXDirectShow Filter
.MSPWindows Installer Patch
.CHSWindows Chinese Noise-Word List File
.SAVEDSEARCHSpotlight Saved Search
.CANNEDSEARCHApple Predefined Search
.VXDVirtual Device Driver
.1Unix Section 1 Manual Page
.MBNMulti Boot Image
.JOBWindows Task Scheduler Job File
.NLSMicrosoft National Language Support File
.SBFAndroid System File
.CNTHelp Contents File
.WPXPrinter Description File
.8CUTI-84 Plus C Operating System File
.KEXTMac OS X Kernel Extension
.CRASHMac OS X Crash Log File
.HLPWindows Help File
.FPBFMac OS X Burn Folder
.CM0012Configuration Management File
.2FSPuppy Linux Save State File
.IDXIndex File
.8XUTI-83 and TI-84 Plus Operating System File
.CONFIGPROFILEApple Configuration Profile
.PRFWindows System File
.PS2Microsoft Search Catalog Index File
.LOG2Windows Registry Hive Log 2 File
.SQMService Quality Monitoring File
.ADMLGroup Policy Language-Specific Administrative Template
.CHGWindows Net Logon File
.CPQCompaq OEM Disc Configuration File
.EMERALDEmerald Theme
.PANICKernel Panic File
.NTFSNTFS Partition File
.LEXSpelling Dictionary File
.WLUWindows Legacy Update
.TDZDrobo Firmware File
.SCHEMASGConf Schema Definition File
.IMEWindows Input Method Editor File
.4Unix Section 4 Manual Page
.GRPWindows Program Manager Group
.JOURNALLinux Journald Event Log
.B84TI-84 Plus CE Bundle Image
.SWPSwap File
.SHSHiPhone/iPod Touch SHSH Blob File
.0Android CA Digital Certificate
.UTVSmartCast TV Firmware Update
.FFXMicrosoft Find Fast Index
.386Windows Virtual Device Driver
.ODEXOptimized Dalvik Executable
.LSTGRUB Boot List File
.WERWindows Error Report
.DATABASE_UUIDAndroid Stale Thumbnails Identifier
.DEVWindows Device Driver File
.BLFCLFS Base Log File
.SAVERMac OS X Screen Saver
.HCDSamsung Android Firmware File
.HHCHTML Help Table of Contents
.ADVAudio Driver File
.KOLinux Kernel Module File
.CHKNetgear Router Firmware File
.TRASHINFOLinux Trash Metadata File
.ICLWindows Icon Library File
.GROUPWindows Contacts Group File
.THAWindows Thai Noise-Words List File
.IPODRockbox Firmware File
.KDZLG Mobile Device Firmware
.IM4PIMG4 Payload File
.PROVISIONPROFILEApple Provision Profile
.PRINTEREXPORTWindows Printer Migration File
.2Unix Section 2 Manual Page
.DIMAXDiMAX Firmware Image File
.DICWindows 10 Custom Spelling Dictionary
.STRWindows Screensaver File
.METADATA_NEVER_INDEXSpotlight Never Index File
.NLTWindows Transliteration File
.PROFILEBash Shell Profile
.FLGPuppy Linux Partition Flag File
.PIDCreative Driver File
.CHTWindows Chinese Traditional Noise-Word List File
.BMKWindows Help Bookmarks
.NETWORKCONNECTApple Network Connect Document
.PFXPKCS #12 Certificate File
.MUMWindows Vista Update Package
.RUFSamsung DVD and Blu-ray Player Firmware File
.NBHROM Update Utility Image File
.ATAHDATA Hard Drive Flag File
.MI4Audio Player Firmware File
.EVTWindows Event Viewer Log File
.FFOFind Fast Document Properties Cache
.CPICodepage Information File
.BOMMac OS X Bill of Materials File
.XRM-MSMicrosoft Security Certificate
.PRTPrinter Driver File
.EVTXWindows 7 Event Log File
.KBDKeyboard Layout Script
.MYDOCSSend To My Documents
.KSKickstart File
.SPLWindows Print Spool File
.BK2Windows Indexing Service Data File
.CPRWindows Phone Display Settings File
.MMVMagnex Firmware File
.BK1Windows Indexing Service File
.SINSony Xperia Firmware File
.RCVBIOS Recovery File
.DLXRenamed DLL File
.SCFWindows Explorer Command
.LMLanguage Model File
.DEVICEMETADATA-MSDevice Metadata Package
.IMG2iPhone Firmware Image
.HPJHelp Project File
.TBRESMicrosoft Store TokenBroker Cache File
.TRASHChromeOS Trash Storage
.MEMParallels Desktop Memory Dump File
.SPRXSigned PlayStation Relocatable Executable
.GMMPWCS Gamut Map Model Profile
.MUNWindows System Resource Archive
.DIAGPKGTroubleshooting Pack File
.ESCOPYES File Explorer File Manager Temporary File
.KCmacOS Kernel Extension Boot File
.WGZS60 Web Runtime Widget Package
.SEFWSecure Element Firmware
.UCEWindows UCE System File
.XFBXserve RAID Firmware Binary File
.HSHWindows Catalog Search Index File
.RFWRockchip Firmware File
.SELFSigned Executable and Linkable Format
.FTRIRIX File Type Rules File
.IFWINTUS Firmware File
.THUMBNAILSAndroid Thumbnails Folder
.TRASHESmacOS USB Flash Drive Trash Folder
.SO.0Unix Shared Library File
.OZIPOPPO Smartphone Firmware Update
.SCAPEFI Firmware File
.PS1Microsoft Indexing Service Data File
.GRLWindows Update Status File
.DOCKMac OS X Dock Extra
.DSSDCC Active Designer File
.MEPuppy Linux Partition Flag File
.MSSTYLEWindows XP Unsigned Style
.FL1Lenovo BIOS Update File
.LPDLPD Daemon Print Permissions File
.FFAFind Fast Status File
.3Unix Section 3 Manual Page
.RSWindows Rating System File
.KEYAndroid Passcode File
.PPMPost Programmable Memory File
.FTSWindows Help Full Text Search Index
.IUSInfoTMIC Firmware Update File
.RC2Samsung Mobile Device Firmware File
.VDEXValidated Dalvik Executable File
.JETKEYiOS Support Jet File
.IDIEVA Controller Event Log
.SBSlax Bundle
.BUDBinary Printer Description File
.VGDGeneric CADD VGA Driver
.DIAGCFGTroubleshooting Pack Configuration File
.RCOPlayStation Portable Resource File
.6Unix Section 6 Manual Page
.7Unix Section 7 Manual Page
.IPTHEMEIconPackager Raw Theme File
.PUSH_DEVICEIDAndroid Device Identification File
.5Unix Section 5 Manual Page
.LPDLookout Protocol Driver File
.WPHPhoenix BIOS File
.KWIToyota Entune Update File
.QKYQuirky Kernel
.DYCXerox Printer Driver Configuration File
.8Unix Section 8 Manual Page
.JPNWindows Japanese Noise-Word List File
.FIDMicrosoft Catalog Indexing Service File
.KLAndroid Key Layout File
.TASony Firmware File
.LOCALIZEDmacOS Directory Localization File
.INTERNETCONNECTApple Internet Connect Document
.SPXSystem Profiler XML Report
.KORWindows Korean Noise-Words List File
.MRMMIUI Theme Metadata
.MRCMIUI Theme Content Package
.ITSInternet Document Set
.TCO2TI-Nspire CX II Operating System File
.BBFWApple Baseband Firmware Update
.B83TI-83 Premium CE Bundle Image
.ROKURoku TV Firmware Update
.XGFXiegu G Series Firmware Update
.FFLFind Fast Document List
.DUBWindows Spelling Dictionary Identifier
.FTGFull Text Group
.89UTI-89 Titanium Operating System File
.CDMPWCS Device Model Profile
.ANNWindows Help Annotations
.REGLNKRegistry Editor Shortcut File
.HELPMac OS X Help Book
.DIFFBASEWindows Diagnostics Tracking Diffbase File
.RVPSharp Blu-ray Player Firmware File
.IM4MIMG4 Manifest