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