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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.

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