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
.REGRegistry File
.ADMXGroup Policy Administrative Template File
.AMLACPI Machine Language File
.VGAVGA Display Driver
.CURWindows Cursor
.ICNSmacOS Icon Resource
.73UTI-73 Explorer Operating System File
.RMTRouter Firmware File
.ANIWindows Animated Cursor
.ICONPACKAGEIconPackager Theme File
.CLBCOM+ Catalog File
.REGTRANS-MSRegistry Transaction Log File
.HTTHypertext Template
.DLLDynamic Link Library
.WDGTDashboard Widget
.DESKTHEMEPACKWindows 8 Desktop Theme Pack File
.SEARCHCONNECTOR-MSWindows Search Connector File
.INF_LOCWindows Driver Information Cache File
.HVEWindows Registry Hive File
.LNKWindows Shortcut
.DMPWindows Memory Dump
.PK2Silkroad Online Game Data File
.DVDDOS Device Driver
.MDMPWindows Minidump
.ITEMDATA-MSWindows 8 Start Screen Item Data File
.THEMEMicrosoft Plus! Desktop Theme
.VX_Compressed Virtual Device Driver File
.QVMQ Virtual Machine
.RC1Samsung Mobile Device Firmware File
.NFOSystem Information File
.FTFFlashTool Firmware File
.EBDWindows EBD System File
.DESKLINKDesktop Shortcut
.NTWindows NT Startup File
.LIBRARY-MSWindows Library Description File
.SYSWindows System File
.HIVWindows Registry Hive File
.SFCACHEReadyBoost Cache File
.ASECAndroid Secure Application File
.FIRMBoot9Strap 3DS Firmware File
.IONFile Description File
.PCKSystem Center Configuration Manager Package File
.PROPAndroid Build Properties File
.ELFExecutable and Linkable Format File
.ICOIcon File
.SCRWindows Screensaver
.MANIFESTWindows Application Manifest File
.PATDiskStation Manager Installation File
.000Indexing Service Data File
.MUIMultilingual User Interface File
.ETLMicrosoft Event Trace Log File
.CGZLinux Drivers Archive
.ZONE.IDENTIFIERWindows Zone Identifier File
.LOCKFILEMac OS X PLIST Lock File
.BINRouter Firmware File
.H1SWindows Assistance Platform Help File
.SERVICESystemd Service Unit File
.MODGRUB Module
.PREFPANEMac OS X System Preference Pane
.NLTWindows Transliteration File
.PWLWindows Password List
.CIWindows Content Indexer Catalog File
.MENUmacOS Menu Extra
.MAPIMAILSend To Mail Recipient
.TIMERSystemd Unit Configuration File
.FFXMicrosoft Find Fast Index
.EDJEnlightenment Theme File
.DATWindows Registry Hive File
.MSCMicrosoft Management Console Snap-in Control File
.LOG1Windows Registry Hive Log File
.ADMAdministrative Template File
.SDBCustom Application Compatibility Database
.CM0013Samsung Smart TV Index File
.EFIExtensible Firmware Interface File
.BASH_HISTORYBash History File
.CABWindows Cabinet File
.BASH_PROFILEBash Interactive Login Shell File
.FXReadyBoot Trace File
.WDFWindows Driver Foundation File
.PNFPrecompiled INF File
.MLCMicrosoft Language Interface Pack
.LFSSamsung Phone params.lfs File
.MOBILECONFIGApple Mobile Configuration File
.FOTAFirmware Over-the-Air File
.MSSTYLESWindows XP Style
.PITSamsung Phone Firmware File
.C32Syslinux COM32 Module
.SYSMotorola Driver File
.MSPWindows Installer Patch
.DRVDevice Driver
.MTZMIUI Theme
.MBRMaster Boot Record File
.POLWindows Policy File
.GROUPWindows Contacts Group File
.HHKHTML Help Index
.WEBPNPWeb Point and Print File
.SBNCisco IP Phone Firmware File
.0Shared Library Link File
.208ASUS Notebook BIOS 208 Update File
.BCDWindows Boot Configuration Data File
.BASHRCBash Non-Interactive Login Shell File
.CPLWindows Control Panel Item
.DITActive Directory Information Tree File
.INSInternet Naming Service File
.DEVWindows Device Driver File
.PDRWindows Port Driver
.IMG3iPhone IMG3 File
.3FSPuppy Linux Save State File
.IOPLISTMac OS X IOPLIST File
.PLASMOIDPlasma Widget
.HDMPWindows Heap Dump
.DTHUMBAndroid Data Thumbnail
.DRPMDelta RPM File
.CATWindows Catalog File
.DIAGCABTroubleshooting Pack Cabinet File
.DATABASE_UUIDAndroid Stale Thumbnails Identifier
.PPDPostScript Printer Description File
.AOSARCHOS PCtablet Firmware File
.SHDWindows Print Job Shadow File
.SDTSiemens Desktop Theme File
.CHSWindows Chinese Noise-Word List File
.BIOBIOS File
.CANNEDSEARCHApple Predefined Search
.MBNMulti Boot Image
.SAVEDSEARCHSpotlight Saved Search
.VXDVirtual Device Driver
.1Unix Section 1 Manual Page
.CNTHelp Contents File
.JOBWindows Task Scheduler Job File
.NLSMicrosoft National Language Support File
.8CUTI-84 Plus C Operating System File
.WPXPrinter Description File
.SBFAndroid System File
.KEXTMac OS X Kernel Extension
.BOMMac OS X Bill of Materials File
.MUI_CCCD5AE0Hid User Library
.FPBFMac OS X Burn Folder
.LSTGRUB Boot List File
.IDXIndex File
.8XUTI-83 and TI-84 Plus Operating System File
.NB0Device Boot Loader Image
.PRFWindows System File
.LOG2Windows Registry Hive Log 2 File
.ADMLGroup Policy Language-Specific Administrative Template
.386Windows Virtual Device Driver
.HLPWindows Help File
.DFUiOS DFU File
.GRPWindows Program Manager Group
.PANICKernel Panic File
.WERWindows Error Report
.SHSHiPhone/iPod Touch SHSH Blob File
.CHGWindows Net Logon File
.CPQCompaq OEM Disc Configuration File
.SCHEMASGConf Schema Definition File
.KSKickstart File
.TDZDrobo Firmware File
.IMEWindows Input Method Editor File
.SWPSwap File
.CRASHMac OS X Crash Log File
.2FSPuppy Linux Save State File
.ODEXOptimized Dalvik Executable
.PROFILEBash Shell Profile
.SQMService Quality Monitoring File
.SAVERMac OS X Screen Saver
.PS2Microsoft Search Catalog Index File
.CHKNetgear Router Firmware File
.HCDSamsung Android Firmware File
.CONFIGPROFILEApple Configuration Profile
.KOLinux Kernel Module File
.HHCHTML Help Table of Contents
.ADVAudio Driver File
.METADATA_NEVER_INDEXSpotlight Never Index File
.PRINTEREXPORTWindows Printer Migration File
.PROVISIONPROFILEApple Provision Profile
.PROTurboIntegrator Process Definition File
.DIMAXDiMAX Firmware Image File
.THAWindows Thai Noise-Words List File
.IM4PIMG4 Payload File
.IPODRockbox Firmware File
.ICLWindows Icon Library File
.BLFCLFS Base Log File
.NTFSNTFS Partition File
.FLGPuppy Linux Partition Flag File
.PFXPKCS #12 Certificate File
.BMKWindows Help Bookmarks
.CHTWindows Chinese Traditional Noise-Word List File
.MSSTYLEWindows XP Unsigned Style
.ATAHDATA Hard Drive Flag File
.NBHROM Update Utility Image File
.MI4Audio Player Firmware File
.FFOFind Fast Document Properties Cache
.KEYAndroid Passcode File
.CPICodepage Information File
.TRX_DLLWindows Startup File
.CAPASUS BIOS Update File
.PIDCreative Driver File
.PRTPrinter Driver File
.XRM-MSMicrosoft Security Certificate
.RUFSamsung DVD and Blu-ray Player Firmware File
.STRWindows Screensaver File
.CUSTOMDESTINATIONS-MSWindows Jump List File
.SO.0Unix Shared Library File
.CM0012Configuration Management File
.EVTXWindows 7 Event Log File
.BK2Windows Indexing Service Data File
.SPLWindows Print Spool File
.MUMWindows Vista Update Package
.THUMBNAILSAndroid Thumbnails Folder
.CPRWindows Phone Display Settings File
.PS1Microsoft Indexing Service Data File
.SCFWindows Explorer Command
.CMOASUS BIOS File
.BK1Windows Indexing Service File
.SINSony Xperia Firmware File
.RFWRockchip Firmware File
.DOCKMac OS X Dock Extra
.OZIPOPPO Smartphone Firmware Update
.SPRXSigned PlayStation Relocatable Executable
.3Unix Section 3 Manual Page
.KCmacOS Kernel Extension Boot File
.HSHWindows Catalog Search Index File
.TBRESMicrosoft Store TokenBroker Cache File
.DLXRenamed DLL File
.MEPuppy Linux Partition Flag File
.FTRIRIX File Type Rules File
.DIAGPKGTroubleshooting Pack File
.KDZLG Mobile Device Firmware
.MEMParallels Desktop Memory Dump File
.WGZS60 Web Runtime Widget Package
.HPJHelp Project File
.0Android CA Digital Certificate
.SHSH2iOS SHSH Blob
.B83TI-83 Premium CE Bundle Image
.GMMPWCS Gamut Map Model Profile
.MUNWindows System Resource Archive
.EVTWindows Event Viewer Log File
.B84TI-84 Plus CE Bundle Image
.IFWINTUS Firmware File
.EFIRESEFI Image File
.UCEWindows UCE System File
.ESCOPYES File Explorer File Manager Temporary File
.XFBXserve RAID Firmware Binary File
.GRLWindows Update Status File
.SCAPEFI Firmware File
.LPDLPD Daemon Print Permissions File
.NETWORKCONNECTApple Network Connect Document
.FFAFind Fast Status File
.FL1Lenovo BIOS Update File
.MYDOCSSend To My Documents
.AUTOMATICDESTINATIONS-MSWindows Jump List File
.KBDKeyboard Layout Script
.TRASHESmacOS USB Flash Drive Trash Folder
.DYCXerox Printer Driver Configuration File
.DEVICEMETADATA-MSDevice Metadata Package
.PPMPost Programmable Memory File
.LMLanguage Model File
.RC2Samsung Mobile Device Firmware File
.DSSDCC Active Designer File
.FTSFull Text Search
.IDIEVA Controller Event Log
.SBSlax Bundle
.VGDGeneric CADD VGA Driver
.BUDBinary Printer Description File
.KWIToyota Entune Update File
.WPHPhoenix BIOS File
.IPTHEMEIconPackager Raw Theme File
.DICWindows 10 Custom Spelling Dictionary
.RCOPlayStation Portable Resource File
.DIAGCFGTroubleshooting Pack Configuration File
.LPDLookout Protocol Driver File
.PUSH_DEVICEIDAndroid Device Identification File
.QKYQuirky Kernel
.RSWindows Rating System File
.JPNWindows Japanese Noise-Word List File
.LOCALIZEDmacOS Directory Localization File
.FIDMicrosoft Catalog Indexing Service File
.KLAndroid Key Layout File
.TASony Firmware File
.INTERNETCONNECTApple Internet Connect Document
.SPXSystem Profiler XML Report
.2Unix Section 2 Manual Page
.DUBWindows Spelling Dictionary Identifier
.JETKEYiOS Support Jet File
.MMVMagnex Firmware File
.ITSInternet Document Set
.7Unix Section 7 Manual Page
.RCVBIOS Recovery File
.6Unix Section 6 Manual Page
.TCO2TI-Nspire CX II Operating System File
.TRASHINFOLinux Trash Metadata File
.4Unix Section 4 Manual Page
.WLUWindows Legacy Update
.89UTI-89 Titanium Operating System File
.5Unix Section 5 Manual Page
.FTGFull Text Group
.CDMPWCS Device Model Profile
.LEXSpelling Dictionary File
.ROKURoku TV Firmware Update File
.KORWindows Korean Noise-Words List File
.EMERALDEmerald Theme
.BBFWApple Baseband Firmware Update
.IUSInfoTMIC Firmware Update File
.FFLFind Fast Document List
.ANNWindows Help Annotations
.REGLNKRegistry Editor Shortcut File
.HELPMac OS X Help Book
.8Unix Section 8 Manual Page
.DIFFBASEWindows Diagnostics Tracking Diffbase File
.VDEXValidated Dalvik Executable File
.SELFSigned Executable and Linkable Format
.RVPSharp Blu-ray Player Firmware File
.SEFWSecure Element Firmware