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
.73UTI-73 Explorer Operating System File
.REGTRANS-MSRegistry Transaction Log File
.ICNSmacOS Icon Resource File
.FTFFlashTool Firmware File
.ICONPACKAGEIconPackager Theme File
.CLBCOM+ Catalog File
.ANIWindows Animated Cursor
.DLLDynamic Link Library
.DESKTHEMEPACKWindows 8 Desktop Theme Pack File
.SEARCHCONNECTOR-MSWindows Search Connector File
.HTTHypertext Template
.DESKLINKDesktop Shortcut
.LNKWindows Shortcut
.VGAVGA Display Driver
.HVEWindows Registry Hive File
.ITEMDATA-MSWindows 8 Start Screen Item Data File
.DMPWindows Memory Dump
.NFOSystem Information File
.DVDDOS Device Driver
.MDMPWindows Minidump
.PK2Silkroad Online Game Data File
.RMTRouter Firmware File
.VX_Compressed Virtual Device Driver File
.THEMEMicrosoft Plus! Desktop Theme
.QVMQ Virtual Machine
.NTWindows NT Startup File
.PCKSystem Center Configuration Manager Package File
.EBDWindows EBD System File
.INF_LOCWindows Driver Information Cache File
.ICOIcon File
.SYSWindows System File
.LIBRARY-MSWindows Library Description File
.HIVWindows Registry Hive File
.SFCACHEReadyBoost Cache File
.RC1Samsung Mobile Device Firmware File
.SCRWindows Screensaver
.ASECAndroid Secure Application File
.PROPAndroid Build Properties File
.MANIFESTWindows Application Manifest File
.BASH_HISTORYBash History File
.IONFile Description File
.PATDiskStation Manager Installation File
.ELFExecutable and Linkable Format File
.BINRouter Firmware File
.CABWindows Cabinet File
.ETLMicrosoft Event Trace Log File
.CPLWindows Control Panel Item
.TIMERSystemd Unit Configuration File
.CGZLinux Drivers Archive
.FFXMicrosoft Find Fast Index
.LOG1Windows Registry Hive Log File
.FOTAFirmware Over-the-Air File
.CIWindows Content Indexer Catalog File
.ZONE.IDENTIFIERWindows Zone Identifier File
.PREFPANEMac OS X System Preference Pane
.MUIMultilingual User Interface File
.000Indexing Service Data File
.MENUmacOS Menu Extra
.NLTWindows Transliteration File
.EDJEnlightenment Theme File
.SERVICESystemd Service Unit File
.PWLWindows Password List
.FIRMBoot9Strap 3DS Firmware File
.MAPIMAILSend To Mail Recipient
.DATWindows Registry Hive File
.MSCMicrosoft Management Console Snap-in Control File
.H1SWindows Assistance Platform Help File
.ADMAdministrative Template File
.FXReadyBoot Trace File
.WDFWindows Driver Foundation File
.SDBCustom Application Compatibility Database
.LFSSamsung Phone params.lfs File
.MLCMicrosoft Language Interface Pack
.BASH_PROFILEBash Interactive Login Shell File
.MSSTYLESWindows XP Style
.CM0013Samsung Smart TV Index File
.MOBILECONFIGApple Mobile Configuration File
.PNFPrecompiled INF File
.SYSMotorola Driver File
.PITSamsung Phone Firmware File
.EFIExtensible Firmware Interface File
.MBRMaster Boot Record File
.DRVDevice Driver
.C32Syslinux COM32 Module
.POLWindows Policy File
.WEBPNPWeb Point and Print File
.SBNCisco IP Phone Firmware File
.HHKHTML Help Index
.GROUPWindows Contacts Group File
.0Shared Library Link File
.208ASUS Notebook BIOS 208 Update File
.DIAGCABTroubleshooting Pack Cabinet File
.BCDWindows Boot Configuration Data File
.BASHRCBash Non-Interactive Login Shell File
.INSInternet Naming Service File
.PLASMOIDPlasma Widget
.3FSPuppy Linux Save State File
.PDRWindows Port Driver
.IMG3iPhone IMG3 File
.MSPWindows Installer Patch
.DRPMDelta RPM File
.PRFWindows System File
.AOSARCHOS PCtablet Firmware File
.SDTSiemens Desktop Theme File
.CHSWindows Chinese Noise-Word List File
.DTHUMBAndroid Data Thumbnail
.CNTHelp Contents File
.SAVEDSEARCHSpotlight Saved Search
.DITActive Directory Information Tree File
.CANNEDSEARCHApple Predefined Search
.VXDVirtual Device Driver
.NLSMicrosoft National Language Support File
.JOBWindows Task Scheduler Job File
.PPDPostScript Printer Description File
.MBNMulti Boot Image
.WPXPrinter Description File
.SBFAndroid System File
.SQMService Quality Monitoring File
.HDMPWindows Heap Dump
.CATWindows Catalog File
.CRASHMac OS X Crash Log File
.MUI_CCCD5AE0Hid User Library
.DEVWindows Device Driver File
.FPBFMac OS X Burn Folder
.BOMMac OS X Bill of Materials File
.LOG2Windows Registry Hive Log 2 File
.PROFILEBash Shell Profile
.LSTGRUB Boot List File
.NB0Device Boot Loader Image
.SHDWindows Print Job Shadow File
.8XUTI-83 and TI-84 Plus Operating System File
.KEYSecurity Key
.ADMLGroup Policy Language-Specific Administrative Template
.HLPWindows Help File
.SCHEMASGConf Schema Definition File
.PANICKernel Panic File
.CHGWindows Net Logon File
.IMEWindows Input Method Editor File
.TDZDrobo Firmware File
.CPQCompaq OEM Disc Configuration File
.GRPWindows Program Manager Group
.SHSHiPhone/iPod Touch SHSH Blob File
.KSKickstart File
.SWPSwap File
.CM0012Configuration Management File
.IDXIndex File
.386Windows Virtual Device Driver
.2FSPuppy Linux Save State File
.KEXTMac OS X Kernel Extension
.FLGPuppy Linux Partition Flag File
.KOLinux Kernel Module File
.HHCHTML Help Table of Contents
.PS2Microsoft Search Catalog Index File
.HCDSamsung Android Firmware File
.CHKNetgear Router Firmware File
.ODEXOptimized Dalvik Executable
.WERWindows Error Report
.ADVAudio Driver File
.DIMAXDiMAX Firmware Image File
.THAWindows Thai Noise-Words List File
.CPICodepage Information File
.8CUTI-84 Plus C Operating System File
.IM4PIMG4 Payload File
.ICLWindows Icon Library File
.PRINTEREXPORTWindows Printer Migration File
.PROTurboIntegrator Process Definition File
.NTFSNTFS Partition File
.PFXPKCS #12 Certificate File
.BMKHelp Bookmarks
.CHTWindows Chinese Traditional Noise-Word List File
.METADATA_NEVER_INDEXSpotlight Never Index File
.BLFCLFS Base Log File
.MI4Audio Player Firmware File
.ATAHDATA Hard Drive Flag File
.NBHROM Update Utility Image File
.FFOFind Fast Document Properties Cache
.TRX_DLLWindows Startup File
.MSSTYLEWindows XP Unsigned Style
.SO.0Unix Shared Library File
.PIDCreative Driver File
.XRM-MSMicrosoft Security Certificate
.PRTPrinter Driver File
.STRWindows Screensaver File
.SAVERMac OS X Screen Saver
.THUMBNAILSAndroid Thumbnails Folder
.CONFIGPROFILEApple Configuration Profile
.BK2Windows Indexing Service Data File
.SPLWindows Print Spool File
.RUFSamsung DVD and Blu-ray Player Firmware File
.MUMWindows Vista Update Package
.CPRWindows Phone Display Settings File
.PS1Microsoft Indexing Service Data File
.EVTXWindows 7 Event Log File
.HSHWindows Catalog Search Index File
.BK1Windows Indexing Service File
.DLXRenamed DLL File
.MEPuppy Linux Partition Flag File
.SINSony Xperia Firmware File
.0Android CA Digital Certificate
.UCEWindows UCE System File
.LPDLPD Daemon Print Permissions File
.DICWindows 10 Custom Spelling Dictionary
.MEMParallels Desktop Memory Dump File
.B83TI-83 Premium CE Bundle Image
.B84TI-84 Plus CE Bundle Image
.MUNWindows System Resource Archive
.GMMPWCS Gamut Map Model Profile
.KDZLG Mobile Device Firmware
.DIAGPKGTroubleshooting Pack File
.DATABASE_UUIDAndroid Stale Thumbnails Identifier
.ESCOPYES File Explorer File Manager Temporary File
.RFWRockchip Firmware File
.HPJHelp Project File
.IFWINTUS Firmware File
.PROVISIONPROFILEApple Provision Profile
.XFBXserve RAID Firmware Binary File
.SCAPEFI Firmware File
.SCFWindows Explorer Command
.GRLWindows Update Status File
.TRASHESmacOS USB Flash Drive Trash Folder
.FFAFind Fast Status File
.FL1Lenovo BIOS Update File
.DEVICEMETADATA-MSDevice Metadata Package
.DYCXerox Printer Driver Configuration File
.KBDKeyboard Layout Script
.PPMPost Programmable Memory File
.OZIPOPPO Smartphone Firmware Update
.RC2Samsung Mobile Device Firmware File
.DSSDCC Active Designer File
.IDIEVA Controller Event Log
.SBSlax Bundle
.BUDBinary Printer Description File
.VGDGeneric CADD VGA Driver
.DIAGCFGTroubleshooting Pack Configuration File
.IPODRockbox Firmware File
.RCOPlayStation Portable Resource File
.IPTHEMEIconPackager Raw Theme File
.FTSFull Text Search
.LPDLookout Protocol Driver File
.WPHPhoenix BIOS File
.LOCALIZEDmacOS Directory Localization File
.NETWORKCONNECTApple Network Connect Document
.MYDOCSSend To My Documents
.RSWindows Rating System File
.QKYQuirky Kernel
.JPNWindows Japanese Noise-Word List File
.FIDMicrosoft Catalog Indexing Service File
.WGZS60 Web Runtime Widget Package
.TASony Firmware File
.SPXSystem Profiler XML Report
.IUSInfoTMIC Firmware Update File
.EVTWindows Event Viewer Log File
.KORWindows Korean Noise-Words List File
.RCVBIOS Recovery File
.MMVMagnex Firmware File
.TCO2TI-Nspire CX II Operating System File
.ROKURoku TV Firmware Update File
.89UTI-89 Titanium Operating System File
.WLUWindows Legacy Update
.DOCKMac OS X Dock Extra
.DUBWindows Spelling Dictionary Identifier
.LMLanguage Model File
.VDEXValidated Dalvik Executable File
.TRASHINFOLinux Trash Metadata File
.LEXSpelling Dictionary File
.FFLFind Fast Document List
.REGLNKRegistry Editor Shortcut File
.FTGFull Text Group
.EMERALDEmerald Theme
.CDMPWCS Device Model Profile
.KWIToyota Entune Update File
.ANNHelp Annotations
.HELPMac OS X Help Book
.DIFFBASEWindows Diagnostics Tracking Diffbase File
.INTERNETCONNECTApple Internet Connect Document
.ITSInternet Document Set
.RVPSharp Blu-ray Player Firmware File
.SPRXSigned PlayStation Relocatable Executable
.SELFSigned Executable and Linkable Format