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
.VGAVGA Display Driver
.HVEWindows Registry Hive File
.REGRegistry File
.SHSH2iOS SHSH Blob
.AMLACPI Machine Language File
.CURWindows Cursor Image
.REGTRANS-MSRegistry Transaction Log File
.CLBCOM+ Catalog File
.ANIWindows Animated Cursor
.NTWindows NT Startup File
.EDJEnlightenment Theme File
.WDGTDashboard Widget
.ICNSmacOS Icon Resource
.DLLDynamic Link Library
.DESKTHEMEPACKWindows 8 Desktop Theme Pack File
.ICONPACKAGEIconPackager Theme File
.SERVICESystemd Service Unit File
.PK2Silkroad Online Game Data File
.DMPWindows Memory Dump
.DVDDOS Device Driver
.FTFFlashTool Firmware File
.THEMEMicrosoft Plus! Desktop Theme
.HIVWindows Registry Hive File
.VX_Compressed Virtual Device Driver File
.IOPLISTMac OS X IOPLIST File
.QVMQ Virtual Machine
.MODGRUB Module
.LNKWindows Shortcut
.MDMPWindows Minidump
.ELFExecutable and Linkable Format File
.SEARCHCONNECTOR-MSWindows Search Connector File
.LOCKFILEMac OS X PLIST Lock File
.EBDWindows EBD System File
.HTTHypertext Template
.SYSWindows System File
.SFCACHEReadyBoost Cache File
.PCKSystem Center Configuration Manager Package File
.ICOIcon File
.MANIFESTWindows Application Manifest File
.FIRMBoot9Strap 3DS Firmware File
.BASH_HISTORYBash History File
.NFOSystem Information File
.ASECAndroid Secure Application File
.DESKLINKDesktop Shortcut
.IONFile Description File
.PROPAndroid Build Properties File
.MUIMultilingual User Interface File
.ETLMicrosoft Event Trace Log File
.MENUmacOS Menu Extra
.ZONE.IDENTIFIERWindows Zone Identifier File
.TIMERSystemd Unit Configuration File
.H1SWindows Assistance Platform Help File
.CGZLinux Drivers Archive
.WLUWindows Legacy Update
.RC1Samsung Mobile Device Firmware File
.LMLanguage Model File
.THAWindows Thai Noise-Words List File
.PWLWindows Password List
.MAPIMAILSend To Mail Recipient
.PREFPANEMac OS X System Preference Pane
.BASHRCBash Non-Interactive Login Shell File
.000Indexing Service Data File
.CM0013Samsung Smart TV Index File
.MSCMicrosoft Management Console Snap-in Control File
.DATWindows Registry Hive File
.BINRouter Firmware File
.LOG1Windows Registry Hive Log File
.EFIExtensible Firmware Interface File
.SCRWindows Screensaver
.FXReadyBoot Trace File
.ADMAdministrative Template File
.INF_LOCWindows Driver Information Cache File
.LFSSamsung Phone params.lfs File
.MLCMicrosoft Language Interface Pack
.MUI_CCCD5AE0Hid User Library
.SDBApplication Compatibility Database
.C32Syslinux COM32 Module
.CABWindows Cabinet File
.DRPMDelta RPM File
.FOTAFirmware Over-the-Air File
.ITEMDATA-MSWindows 8 Start Screen Item Data File
.MSSTYLESWindows XP Style
.MOBILECONFIGApple Mobile Configuration File
.PITSamsung Phone Firmware File
.3FSPuppy Linux Save State File
.SYSMotorola Cell Phone Driver
.MTZMIUI Theme
.TRX_DLLWindows Startup File
.73UTI-73 Explorer Operating System File
.PNFPrecompiled INF File
.BASH_PROFILEBash Interactive Login Shell File
.LIBRARY-MSWindows Library Description File
.HHKHTML Help Index
.WEBPNPWeb Point and Print File
.SBNCisco IP Phone Firmware File
.208ASUS Notebook BIOS 208 Update File
.BCDWindows Boot Configuration Data File
.0Shared Library Link File
.DITActive Directory Information Tree File
.MBRMaster Boot Record File
.DTHUMBAndroid Data Thumbnail
.INSInternet Naming Service File
.IMG3iPhone IMG3 File
.NLTWindows Transliteration File
.PLASMOIDPlasma Widget
.DIAGCABTroubleshooting Pack Cabinet File
.DRVDevice Driver
.PS2Microsoft Search Catalog Index File
.CIWindows Content Indexer Catalog File
.HDMPWindows Heap Dump
.PDRWindows Port Driver
.0Android CA Digital Certificate
.NLSMicrosoft National Language Support File
.POLWindows Policy File
.NB0Device Boot Loader Image
.SDTSiemens Desktop Theme File
.PPDPostScript Printer Description File
.CATWindows Catalog File
.SBFAndroid System File
.CANNEDSEARCHApple Predefined Search
.CPLWindows Control Panel Item
.WDFWindows Driver Foundation File
.BIOBIOS File
.SAVEDSEARCHSpotlight Saved Search
.VXDVirtual Device Driver
.MSPWindows Installer Patch
.SHDWindows Print Job Shadow File
.1Unix Section 1 Manual Page
.CM0012Configuration Management File
.HLPWindows Help File
.JOBWindows Task Scheduler Job File
.LOG2Windows Registry Hive Log 2 File
.PATDiskStation Manager Installation File
.SQMService Quality Monitoring File
.AXDirectShow Filter
.8CUTI-84 Plus C Operating System File
.WPXPrinter Description File
.CNTHelp Contents File
.MBNMulti Boot Image
.KEXTMac OS X Kernel Extension
.CRASHMac OS X Crash Log File
.FPBFMac OS X Burn Folder
.2FSPuppy Linux Save State File
.IDXIndex File
.8XUTI-83 and TI-84 Plus Operating System File
.PRFWindows System File
.IMEWindows Input Method Editor File
.CONFIGPROFILEApple Configuration Profile
.ODEXOptimized Dalvik Executable
.ADMLGroup Policy Language-Specific Administrative Template
.DATABASE_UUIDAndroid Stale Thumbnails Identifier
.SWPSwap File
.NTFSNTFS Partition File
.EMERALDEmerald Theme
.LEXSpelling Dictionary File
.PANICKernel Panic File
.DFUiOS DFU File
.SHSHiPhone/iPod Touch SHSH Blob File
.4Unix Section 4 Manual Page
.UTVSmartCast TV Firmware Update
.CPQCompaq OEM Disc Configuration File
.89UTI-89 Titanium Operating System File
.FFXMicrosoft Find Fast Index
.DUBWindows Spelling Dictionary Identifier
.B84TI-84 Plus CE Bundle Image
.TDZDrobo Firmware File
.CHGWindows Net Logon File
.JOURNALLinux Journald Event Log
.SCHEMASGConf Schema Definition File
.386Windows Virtual Device Driver
.BLFCLFS Base Log File
.LSTGRUB Boot List File
.WERWindows Error Report
.AOSARCHOS PCtablet Firmware File
.KOLinux Kernel Module File
.HCDSamsung Android Firmware File
.SAVERMac OS X Screen Saver
.3Unix Section 3 Manual Page
.MUMWindows Vista Update Package
.PROFILEBash Shell Profile
.HHCHTML Help Table of Contents
.ADVAudio Driver File
.PROVISIONPROFILEApple Provision Profile
.STRWindows Screensaver File
.METADATA_NEVER_INDEXSpotlight Never Index File
.IM4PIMG4 Payload File
.CHKNetgear Router Firmware File
.PRINTEREXPORTWindows Printer Migration File
.GROUPWindows Contacts Group File
.DEVICEMETADATA-MSDevice Metadata Package
.KDZLG Mobile Device Firmware
.DIMAXDiMAX Firmware Image File
.KWIToyota Entune Update File
.BMKWindows Help Bookmarks
.NETWORKCONNECTApple Network Connect Document
.PIDCreative Driver File
.RUFSamsung DVD and Blu-ray Player Firmware File
.NBHROM Update Utility Image File
.FFOFind Fast Document Properties Cache
.MI4Audio Player Firmware File
.GRPWindows Program Manager Group
.ATAHDATA Hard Drive Flag File
.CAPASUS BIOS Update File
.PRTPrinter Driver File
.CPICodepage Information File
.VDEXValidated Dalvik Executable File
.DEVWindows Device Driver File
.KBDKeyboard Layout Script
.EVTXWindows 7 Event Log File
.MYDOCSSend To My Documents
.ICLWindows Icon Library File
.FLGPuppy Linux Partition Flag File
.KSKickstart File
.SPLWindows Print Spool File
.THUMBNAILSAndroid Thumbnails Folder
.XRM-MSMicrosoft Security Certificate
.CUSTOMDESTINATIONS-MSWindows Jump List File
.CPRWindows Phone Display Settings File
.RCVBIOS Recovery File
.TRASHINFOLinux Trash Metadata File
.ESCOPYES File Explorer File Manager Temporary File
.EFIRESEFI Image File
.MUNWindows System Resource Archive
.HPJHelp Project File
.TBRESMicrosoft Store TokenBroker Cache File
.SEFWSecure Element Firmware
.CHTWindows Chinese Traditional Noise-Word List File
.FTRIRIX File Type Rules File
.CHSWindows Chinese Noise-Word List File
.2Unix Section 2 Manual Page
.IMG2iPhone Firmware Image
.RFWRockchip Firmware File
.EVTWindows Event Viewer Log File
.BK2Windows Indexing Service Data File
.DLXRenamed DLL File
.OZIPOPPO Smartphone Firmware Update
.CMOASUS BIOS File
.WGZS60 Web Runtime Widget Package
.BOMMac OS X Bill of Materials File
.SINSony Xperia Firmware File
.SCFShell Command File
.TRASHChromeOS Trash Storage
.MMVMagnex Firmware File
.ISDATAIcon Services Data
.IFWINTUS Firmware File
.UCEWindows UCE System File
.KCmacOS Kernel Extension Boot File
.DIAGPKGTroubleshooting Pack File
.GMMPWCS Gamut Map Model Profile
.MEMParallels Desktop Memory Dump File
.XFBXserve RAID Firmware Binary File
.SPRXSigned PlayStation Relocatable Executable
.TRASHESmacOS USB Flash Drive Trash Folder
.SO.0Unix Shared Library File
.GRLWindows Update Status File
.PS1Microsoft Indexing Service Data File
.SCAPEFI Firmware File
.PROTurboIntegrator Process Definition File
.DSSDCC Active Designer File
.KEYAndroid Passcode File
.DOCKMac OS X Dock Extra
.MEPuppy Linux Partition Flag File
.FL1Lenovo BIOS Update File
.LPDLPD Daemon Print Permissions File
.FFAFind Fast Status File
.MSSTYLEWindows XP Unsigned Style
.BK1Windows Indexing Service File
.IPODRockbox Firmware File
.FTSWindows Help Full Text Search Index
.AUTOMATICDESTINATIONS-MSWindows Jump List File
.IUSInfoTMIC Firmware Update File
.RC2Samsung Mobile Device Firmware File
.IDIEVA Controller Event Log
.DICWindows 10 Custom Spelling Dictionary
.JETKEYiOS Support Jet File
.SBSlax Bundle
.VGDGeneric CADD VGA Driver
.RSWindows Rating System File
.PPMPost Programmable Memory File
.5Unix Section 5 Manual Page
.DIAGCFGTroubleshooting Pack Configuration File
.RCOPlayStation Portable Resource File
.PUSH_DEVICEIDAndroid Device Identification File
.QKYQuirky Kernel
.HSHWindows Catalog Search Index File
.7Unix Section 7 Manual Page
.6Unix Section 6 Manual Page
.ROKURoku TV Firmware Update
.KLAndroid Key Layout File
.LPDLookout Protocol Driver File
.WPHPhoenix BIOS File
.IPTHEMEIconPackager Raw Theme File
.8Unix Section 8 Manual Page
.DYCXerox Printer Driver Configuration File
.BUDBinary Printer Description File
.LOCALIZEDmacOS Directory Localization File
.JPNWindows Japanese Noise-Word List File
.TASony Firmware File
.FIDMicrosoft Catalog Indexing Service File
.SELFSigned Executable and Linkable Format
.ANNWindows Help Annotations
.INTERNETCONNECTApple Internet Connect Document
.SPXSystem Profiler XML Report
.ITSInternet Document Set
.FFLFind Fast Document List
.TNOTI-Nspire Operating System File
.MRCMIUI Theme Content Package
.MRMMIUI Theme Metadata
.TCO2TI-Nspire CX II Operating System File
.B83TI-83 Premium CE Bundle Image
.XGFXiegu G Series Firmware Update
.FTGFull Text Group
.BBFWApple Baseband Firmware Update
.KORWindows Korean Noise-Words List File
.REGLNKRegistry Editor Shortcut File
.HELPMac OS X Help Book
.CDMPWCS Device Model Profile
.DIFFBASEWindows Diagnostics Tracking Diffbase File
.RVPSharp Blu-ray Player Firmware File
.IM4MIMG4 Manifest