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