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