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