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