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