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