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