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