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