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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
.PCKSystem Center Configuration Manager Package File
.AMLACPI Machine Language File
.CURWindows Cursor
.REGTRANS-MSRegistry Transaction Log File
.ADMXGroup Policy Administrative Template File
.FTFFlashTool Firmware File
.SEARCHCONNECTOR-MSWindows Search Connector File
.ANIWindows Animated Cursor
.ICONPACKAGEIconPackager Theme File
.DLLDynamic Link Library
.DESKTHEMEPACKWindows 8 Desktop Theme Pack File
.EBDWindows EBD System File
.LNKWindows Shortcut
.DESKLINKDesktop Shortcut
.WDGTDashboard Widget
.HTTHypertext Template File
.DVDDOS Device Driver
.ICNSmacOS Icon Resource File
.VGAVGA Display Driver
.CLBCOM+ Catalog File
.MAPIMAILSend To Mail Recipient
.VX_Compressed Virtual Device Driver File
.DMPWindows Memory Dump
.CPLWindows Control Panel Item
.PK2Silkroad Online Game Data File
.SCRWindows Screensaver
.NFOSystem Information File
.THEMEMicrosoft Plus! Desktop Theme
.MDMPWindows Minidump
.IONFile Description File
.NTWindows NT Startup File
.QVMQ Virtual Machine
.ICOIcon File
.INF_LOCWindows Driver Information Cache File
.SYSWindows System File
.73UTI-73 Explorer Operating System File
.LIBRARY-MSWindows Library Description File
.HIVWindows Registry Hive File
.ASECAndroid Secure Application File
.RC1Samsung Mobile Device Firmware File
.SFCACHEReadyBoost Cache File
.MSCMicrosoft Management Console Snap-in Control File
.MANIFESTWindows Application Manifest File
.PROPAndroid Build Properties File
.BINRouter Firmware File
.PATDiskStation Manager Installation File
.CABWindows Cabinet File
.CANNEDSEARCHApple Predefined Search
.FFXMicrosoft Find Fast Index
.TIMERSystemd Unit Configuration File
.FOTAFirmware Over-the-Air File
.ZONE.IDENTIFIERWindows Zone Identifier File
.H1SWindows Assistance Platform Help File
.DRPMDelta RPM File
.000Indexing Service Data File
.RMTRouter Firmware File
.LOG1Windows Registry Hive Log File
.CGZLinux Drivers Archive
.CIWindows Content Indexer Catalog File
.SERVICESystemd Service Unit File
.BASH_HISTORYBash History File
.MUIMultilingual User Interface File
.PREFPANEMac OS X System Preference Pane
.PWLWindows Password List
.EDJEnlightenment Theme File
.DATWindows Registry Hive File
.ETLMicrosoft Event Trace Log File
.ELFExecutable and Linkable Format File
.BCDWindows Boot Configuration Data File
.BASH_PROFILEBash Interactive Login Shell File
.WDFWindows Driver Foundation File
.SDBCustom Application Compatibility Database
.MLCMicrosoft Language Interface Pack
.SYSMotorola Driver File
.MSSTYLESWindows XP Style
.CM0013Samsung Smart TV Index File
.DRVDevice Driver
.MOBILECONFIGApple Mobile Configuration File
.BOMMac OS X Bill of Materials File
.LFSSamsung Phone params.lfs File
.PITSamsung Phone Firmware File
.C32Syslinux COM32 Module
.0Shared Library Link File
.PNFPrecompiled INF File
.HHKHTML Help Index
.DIMAXDiMAX Firmware Image File
.GROUPWindows Contacts Group File
.WEBPNPWeb Point and Print File
.MBRMaster Boot Record File
.208ASUS Notebook BIOS 208 Update File
.DIAGCABTroubleshooting Pack Cabinet File
.ADMAdministrative Template File
.EFIExtensible Firmware Interface File
.INSInternet Naming Service File
.IMG3iPhone IMG3 File
.3FSPuppy Linux Save State File
.MSPWindows Installer Patch
.POLWindows Policy File
.SDTSiemens Desktop Theme File
.PROFILEBash Shell Profile
.CATWindows Catalog File
.FXReadyBoot Trace File
.DTHUMBAndroid Data Thumbnail
.LOG2Windows Registry Hive Log 2 File
.IMEWindows Input Method Editor File
.SAVEDSEARCHSpotlight Saved Search
.FIRMBoot9Strap 3DS Firmware File
.HVEWindows Registry Hive File
.BASHRCBash Non-Interactive Login Shell File
.VXDVirtual Device Driver
.JOBWindows Task Scheduler Job File
.HCDSamsung Android Firmware File
.CNTHelp Contents File
.PPDPostScript Printer Description File
.WPXPrinter Description File
.KEYSecurity Key
.DITActive Directory Information Tree File
.SBFAndroid System File
.CRASHMac OS X Crash Log File
.FPBFMac OS X Burn Folder
.DEVWindows Device Driver File
.PDRWindows Port Driver
.LSTGRUB Boot List File
.SHDWindows Print Job Shadow File
.PRFWindows System File
.AOSARCHOS PCtablet Firmware File
.8XUTI-83 and TI-84 Plus Operating System File
.ADMLGroup Policy Language-Specific Administrative Template
.MBNMulti Boot Image
.ODEXOptimized Dalvik Executable
.GRPWindows Program Manager Group
.SWPSwap File
.CHGWindows Net Logon File
.SCHEMASGConf Schema Definition File
.NB0Device Boot Loader Image
.SQMService Quality Monitoring File
.CPQCompaq OEM Disc Configuration File
.ITEMDATA-MSWindows 8 Start Screen Item Data File
.MUI_CCCD5AE0Hid User Library
.SHSHiPhone/iPod Touch SHSH Blob File
.HLPWindows Help File
.SBNCisco IP Phone Firmware File
.TDZDrobo Firmware File
.386Windows Virtual Device Driver
.HDMPWindows Heap Dump
.IDXIndex File
.HHCHTML Help Table of Contents
.FLGPuppy Linux Partition Flag File
.PS2Microsoft Search Catalog Index File
.WERWindows Error Report
.METADATA_NEVER_INDEXSpotlight Never Index File
.NLSMicrosoft National Language Support File
.BLFCLFS Base Log File
.2FSPuppy Linux Save State File
.PFXPKCS #12 Certificate File
.ICLWindows Icon Library File
.THAWindows Thai Noise-Words List File
.8CUTI-84 Plus C Operating System File
.KOLinux Kernel Module File
.PROTurboIntegrator Process Definition File
.PRINTEREXPORTWindows Printer Migration File
.CHKNetgear Router Firmware File
.CPICodepage Information File
.ADVAudio Driver File
.CHTWindows Chinese Traditional Noise-Word List File
.TRX_DLLWindows Startup File
.NBHROM Update Utility Image File
.CONFIGPROFILEApple Configuration Profile
.MI4Audio Player Firmware File
.ATAHDATA Hard Drive Flag File
.MSSTYLEWindows XP Unsigned Style
.PRTPrinter Driver File
.IM4PIMG4 Payload File
.KSKickstart File
.RUFSamsung DVD and Blu-ray Player Firmware File
.SAVERMac OS X Screen Saver
.STRWindows Screensaver File
.XRM-MSMicrosoft Security Certificate
.SPLWindows Print Spool File
.KEXTMac OS X Kernel Extension
.THUMBNAILSAndroid Thumbnails Folder
.MUMWindows Vista Update Package
.PS1Microsoft Indexing Service Data File
.BK2Windows Indexing Service Data File
.CM0012Configuration Management File
.KDZLG Mobile Device Firmware
.LPDLPD Daemon Print Permissions File
.TCO2TI-Nspire CX II Operating System File
.GMMPWCS Gamut Map Model Profile
.CHSWindows Chinese Noise-Word List File
.MEMParallels Desktop Memory Dump File
.RFWRockchip Firmware File
.HSHWindows Catalog Search Index File
.PIDCreative Driver File
.HPJHelp Project File
.DLXRenamed DLL File
.FIDMicrosoft Catalog Indexing Service File
.ESCOPYES File Explorer File Manager Temporary File
.DIAGPKGTroubleshooting Pack File
.XFBXserve RAID Firmware Binary File
.UCEWindows UCE System File
.PROVISIONPROFILEApple Provision Profile
.IFWINTUS Firmware File
.TASony Firmware File
.CPRWindows Phone Display Settings File
.GRLWindows Update Status File
.SO.0Unix Shared Library File
.SCFWindows Explorer Command
.NTFSNTFS Partition File
.FL1Lenovo BIOS Update File
.BMKHelp Bookmarks
.KBDKeyboard Layout Script
.DEVICEMETADATA-MSDevice Metadata Package
.FFAFind Fast Status File
.DYCXerox Printer Driver Configuration File
.PPMPost Programmable Memory File
.QKYQuirky Kernel
.FFOFind Fast Document Properties Cache
.EVTXWindows 7 Event Log File
.MEPuppy Linux Partition Flag File
.DSSDCC Active Designer File
.IDIEVA Controller Event Log
.SBSlax Bundle
.VGDGeneric CADD VGA Driver
.FTSFull Text Search
.SCAPEFI Firmware File
.MYDOCSSend To My Documents
.LPDLookout Protocol Driver File
.PLASMOIDPlasma Widget
.WPHPhoenix BIOS File
.IPODRockbox Firmware File
.IPTHEMEIconPackager Raw Theme File
.RCOPlayStation Portable Resource File
.TRASHESmacOS USB Flash Drive Trash Folder
.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
.EMERALDEmerald Theme
.PANICKernel Panic File
.FFLFind Fast Document List
.CDMPWCS Device Model Profile
.DIAGCFGTroubleshooting Pack Configuration File
.IUSInfoTMIC Firmware Update File
.NETWORKCONNECTApple Network Connect Document
.MMVMagnex Firmware File
.SINSony Xperia Firmware File
.KORWindows Korean Noise-Words List File
.REGLNKRegistry Editor Shortcut File
.RCVBIOS Recovery File
.TRASHINFOLinux Trash Metadata File
.89UTI-89 Titanium Operating System File
.FTGFull Text Group
.ANNHelp Annotations
.HELPMac OS X Help Book
.INTERNETCONNECTApple Internet Connect Document
.RC2Samsung Mobile Device Firmware File
.RVPSharp Blu-ray Player Firmware File
.ITSInternet Document Set