| File extension Name |
extension description |
| .L | WATCOM Wlink Directive |
| .l | LEX Program File |
| .L | Game of Life Pattern File |
| .L | Link Instructions |
| .L | LISP Program File |
| .L | Cliq Accessories Datebook Lock File |
| .L | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .L | IRIS Editor Literary Format File (eurobraille) |
| .L | Xcode Core Lex Program (Apple Inc.) |
| .L2L | IBM Voice Type Language Addword File |
| .L2P | IBM Voice Type Language Addword File |
| .L2R | Lineage II Replay (NC Interactive, Inc.) |
| .L3G | Compressed Archive |
| .L4D | Cinema 4D Layout (MAXON Computer GmbH) |
| .L5K | RSLogix 5000 (Rockwell Automation) |
| .L64 | 64LAN Image File |
| .L6T | GearBox Tone File (Line 6, Inc.) |
| .L95 | Library File |
| .LA | GNU Libtool Library (GNU Project - Free Software Foundation) |
| .LA | LA Lossless Compressed Audio |
| .LA | Lightscape Animation |
| .LA | Netscape Packetized Audio |
| .LA1 | Liquid Audio Player Resource DLL (Geneva Media, LLC) |
| .LAA | LucasArts AdLib Audio File Format |
| .LAB | Complete Works Label (Toplevel Computing) |
| .LAB | Mailing Labels |
| .LAB | Outlaws Container File (LucasArts Entertainment Company LLC) |
| .LAB | Q+E Mailing Label |
| .LAB | NGSofts.com LAB Editor (NGSofts.com LAB Editor) |
| .LAB | NCSS/SOLO Data File |
| .LAB | BAR-ONE Lite Label (ZIH Corp.) |
| .LABELS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LABLES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAD | Daylon Leveller Animation Data |
| .LAF | Essential Taceo User License Activation File (Essential Security Software, Inc.) |
| .LAM | Netscape Media Player Streaming Audio Metafile |
| .LAMP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAN | ERDAS IMAGINE LAN Sensor Data (Leica Geosystems , LLC) |
| .LAN | Novell NetWare LAN Drivers |
| .LAND | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LANDSAT | EOSAT Landsat Thematic Mapper Bitmap Data |
| .LANG | Skype Language File (Skype Technologies S.A.) |
| .LANG | CDex Language File |
| .LANGUAGE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAO | Epson Smart Panel File (Epson Corporation) |
| .LAPTOP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAR | Liquid Audio Player Registration File (Geneva Media, LLC) |
| .LARG | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LARGE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LARRY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAS | Log ASCII Standard (LAS) File (The Canadian Well Logging Society (CWLS)) |
| .LAS | Light-O-Rama Animated Sequence (Light-O-Rama) |
| .LASE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LASER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LASSO | Lasso Studio Database Driven Web Page (Blue World Communications, Inc.) |
| .LAST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAT | LATEX |
| .LAT | Crossword Express Lattice File (AUS-PC-SOFT) |
| .LATEST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LATEX | LaTeX Source Document (LaTeX3 Project) |
| .LAUNCH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAUNCHER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAV | Liquid Audio Player Voucher File (Geneva Media, LLC) |
| .LAV | Listlabl File |
| .LAVAITTE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAVS | Liquid Audio Player Secure Streaming Voucher File (Geneva Media, LLC) |
| .LAW | eLawForms Form File (E*Law Publishing Limited) |
| .LAWS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAY | Lightscape Layer State |
| .LAY | Applause Word Chart Layout |
| .LAY | MiTek Engineering File |
| .LAY | Rhino 3D Layer Text File (Robert McNeel & Associates) |
| .LAY | Track Builder Simulation Compiler Code (Signal Computer Consultants) |
| .LAY | Mastercook Layout File (Sierra) |
| .LAY | Pro/ENGINEER (PTC) |
| .LAYER1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAYOUT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LAYOUT | Premiere Layout (Adobe Systems Incorporated) |
| .LAYUP | MSC.Patran Laminate Modeler Composites Ply Layup Information (MSC.Software Corporation) |
| .LA_ | TI Databook File |
| .LB | LB Packer Sound File |
| .LB | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LB | Novanew File |
| .LBA | Liberty BASIC File |
| .LBA | Little Billy's Album Photo Album Project File (Little Billy's Album, Inc.) |
| .LBD | Grafic FLI File |
| .LBD | Life Balance User Data (Llamagraphics, Inc.) |
| .LBE | Life Balance XML-based Data Exchange (Llamagraphics, Inc.) |
| .LBG | dBASE IV Label Generator |
| .LBI | Fifa 2001 Data Feart Legal Screeen |
| .LBI | Dreamweaver Library File |
| .LBK | VersaPro Local Logic Block Backup |
| .LBL | Markin Label File (Markin) |
| .LBL | British National Bibliography File |
| .LBL | Daqarta Extended Audio Data (Interstellar Research) |
| .LBL | Creatacard Label Project (Broderbund) |
| .LBL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LBL | Label |
| .LBM | XLib Linear Bitmap Graphic |
| .LBM | Graphic, Sound |
| .LBM | Amiga Interleaved Bitmap Format (Amiga) |
| .LBM | Deluxe Paint Bitmap |
| .LBM | Deluxe Paint (Electronic Arts, Inc.) |
| .LBO | dBASE IV Ordered Labels |
| .LBR | EAGLE Layout Editor Library (CadSoft Computer, Inc.) |
| .LBR | Compressed Archive File |
| .LBR | CP/M Information File |
| .LBR | Omnis7 Application File (Omnis Software) |
| .LBR | 1-2-3 Display Driver (IBM) |
| .LBS | Omnis Studio Application Library (Raining Data Corporation) |
| .LBT | Foxpro Label Memo (Microsoft Corporation) |
| .LBV | Tonline Ob4hbci Layout Print File |
| .LBW | CCP Log Server Utility Log File (CCP) |
| .LBX | Foxpro Label (Microsoft Corporation) |
| .LBXADD | Libronix DLS Addin |
| .LBXALV | Logos Bible Software Series X Passage In All Versions |
| .LBXCBV | Logos Bible Software Series X Copy Bible Verses Style |
| .LBXCIT | Libronix DLS Citation Format |
| .LBXCMP | Libronix DLS Company Information |
| .LBXCOL | Libronix DLS Resource Collection |
| .LBXCTB | Libronix DLS Custom Toolbar |
| .LBXDAT | Libronix DLS Data File |
| .LBXDTP | Libronix DLS Data Type |
| .LBXGYQ | Libronix DLS Graphical Query |
| .LBXLBK | Libronix DLS License Backup |
| .LBXLIC | Libronix DLS Licenses File |
| .LBXLLS | Libronix DLS Resource |
| .LBXNOT | Libronix DLS Notes |
| .LBXOEB | Libronix DLS Resource |
| .LBXPDF | Libronix DLS Resource |
| .LBXPLN | Logos Bible Software Series X Bible Reading Plan |
| .LBXPLP | Logos Bible Software Series X Parallel Passage |
| .LBXPLV | Logos Bible Software Series X Parallel Bible Versions |
| .LBXPRF | Libronix DLS Preferences |
| .LBXPRL | Logos Bible Software Series X Prayer List |
| .LBXRAS | Libronix DLS Resource Association |
| .LBXRTP | Libronix DLS Resource Type |
| .LBXSDG | Logos Bible Software Series X Sentence Diagram |
| .LBXSHL | Libronix DLS Shell |
| .LBXUPD | Libronix DLS Update Script |
| .LBXVRS | Logos Bible Software Series X Verse List |
| .LBXWDL | Libronix DLS Word List |
| .LBXWKS | Libronix DLS Workspace |
| .LBZ | Leibniz Mathematical Word Processor |
| .LC | Textbridge Classic Bin File |
| .LCA | SimpleFormat Changeables Graphic |
| .LCB | Living Cookbook File |
| .LCB | Concept2 LogCard Utility LogCard Backup Image (Concept2, Inc.) |
| .LCC | IBM Voice Type Language Newuser File |
| .LCC | Capture One PRO Lens Cast Calibration File (Phase One) |
| .LCD | ABBYY Finereader 4.0 Sprint (ABBYY Software House) |
| .LCD | CDspace CD Emulator |
| .LCD | LeoCAD Project (BT Software) |
| .LCE | LockCrypt Database (Harry Jennerway) |
| .LCF | HP-95LX Datacomm Script File |
| .LCF | Linker Control File |
| .LCH | PagePath Technologies LAUNCH! File |
| .LCH | IBM Works for OS/2 Chart |
| .LCI | IBM Voice Type Language Newuser File |
| .LCK | Help 2 Lock File (Microsoft Corporation) |
| .LCK | Frontpage-related File (Microsoft Corporation) |
| .LCK | Pegasus Mail Mailbox Lock File (David Harris) |
| .LCK | Paradox Lock File (Corel) |
| .LCK | PageMaker Database (Adobe Systems Incorporated) |
| .LCK | Inventor Locking File (Autodesk, Inc.) |
| .LCK | Lock File |
| .LCK | ACT! Database Locking File (Best Software CRM Division) |
| .LCK | Dreamweaver Lock File (Adobe Systems Incorporated) |
| .LCL | FTP Software Data |
| .LCM | Lipikar Data (Santanu Ghosh,) |
| .LCN | LCNWindow GUS Virtual Drive File (Honeywell International Inc.) |
| .LCN | WordPerfect Dictionary File (Corel Corporation) |
| .LCO | Railroad Tycoon 3 Locomotive Properties (PopTop Software Inc.) |
| .LCS | ACT! History File (Best Software CRM Division) |
| .LCS | L0phtCrack (@stake) |
| .LCT | Elsie Electrical Filter Design (Tonne Software) |
| .LCW | Lucid 3-D Spreadsheet |
| .LD | Paradox Language Driver (Corel) |
| .LD | PC-Bibliothek User Options (Bibliographisches Institut & F.A. Brockhaus AG) |
| .LD | Telix Long Distance Codes |
| .LD1 | dBASE Overlay File |
| .LD2 | Lingoes Dictionary (Lingoes Project) |
| .LD2 | SediMeter Field Measurement File (Lindorm, Inc.) |
| .LDA | LaserData |
| .LDATA | JSim Line Data Format (University of Washington) |
| .LDB | RPG Maker 2000/2003 Database (Enterbrain) |
| .LDB | Access Lock File (Microsoft Corporation) |
| .LDB | IBM Works for OS/2 Data Filer Database |
| .LDB | Settler for Windows Temporary File |
| .LDB | VisiTrax Music Library Database (Synapsa Productions) |
| .LDB | TrueVector Log Database |
| .LDC | Steuer2001 File |
| .LDD | Laser Dispatch Data |
| .LDF | ProWORX Nxt Logic Data (Schneider Electric) |
| .LDF | LDIF Script |
| .LDF | SQL Server Transaction Log File (Microsoft Corporation) |
| .LDF | TriboIndenter Air Indent Electrostatic Force Constant Calibration (Hysitron Incorporated) |
| .LDF | enotate Layered Data Format File (Informal Software, D.I.P., Ischian Systems) |
| .LDF | LuraDocument File |
| .LDF | IBM Works for OS/2 Data Filer Form |
| .LDF | Geoworks Glue Library Definition |
| .LDFX | LogPlot 7 LogDeesign Format File (RockWare, Inc.) |
| .LDI | LDIF File |
| .LDIF | LDAP Data Interchange Format |
| .LDL | Corel Paradox Delivered Library |
| .LDL | OzWin CompuServe E-mail/Forum Access Download Request |
| .LDP | Label Designer Plus DELUXE Data File (CAM Development) |
| .LDR | Yamaha Live Drum Kits (Yamaha Corporation of America) |
| .LDR | LDraw Model File (Estate of James Jessiman) |
| .LDR | Symantec Ghost Template File (Symantec Corporation) |
| .LDS | Laser Dispatch Script |
| .LDS | LOUDNESS Sound System |
| .LDS | Trane Trace Load |
| .LDS | Corel40 Programs Data File |
| .LDX | Liquid Studio Liquid Executable Bytecode (Global Heavy Industries) |
| .LD_ | Visc15 Adressen Setup File |
| .LE | Opera Binary Voice-related File (Opera Software ASA) |
| .LE | DOS/4GW PM 32X DOS Extender Executable Image |
| .LE$ | BASIC VB |
| .LEECHGET | LeechGet Download Manager Temporary File (Martin Albiez) |
| .LEF | Lenex XML Data (GeoLogix AG) |
| .LEFT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEFTY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEG | Legacy Graphic Format |
| .LEGIT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEMONS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEN | PlatePrep |
| .LEN | Sheffield Dictionary File |
| .LEN | XNBC V8 Biological Neural Network Simulation Workstation Axon Lengths |
| .LENGTH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LENTH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEP | Label and Envelope Designer Plus 2000 |
| .LES | Learn Lesson File |
| .LES | Lesson File |
| .LES | Logitech Entertainment Game Profile |
| .LES | Mklesson Lesson File |
| .LESPAUL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LET | Letter |
| .LET | Genesis 2000 (Genesis 2000, Inc.) |
| .LET | Creatacard Letterhead Project (Broderbund) |
| .LET | Nuke Randomic Life Generator |
| .LET | Maestro Icons File |
| .LETTER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LETTERS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEV | Return to Wonderland Classic Version Level File (Midnight Synergy) |
| .LEV | Liero Level |
| .LEV | NetHack Level File |
| .LEV | Worms Armageddon Map |
| .LEV | Worms World Party Map |
| .LEVEL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LEVEL | Homeworld Level Data (Sierra Entertainment, Inc.) |
| .LEX | Lexmark Printer Install File |
| .LEX | Acrobat (Adobe Systems Incorporated) |
| .lex | lex or flex File |
| .LEX | Lexicon (Dictionary) |
| .LEX | HP-Basic Language Extension |
| .LEY | Leylines Map File or Saved Game (Crystal Shard) |
| .LEY | Notes 5 Full Text Index (IBM) |
| .LE_ | BASIC VB Compressed Disk1 File |
| .LF | SoftwareKey License File |
| .LFA | LifeForm File |
| .LFA | IncrediMail Default Animations (IncrediMail Ltd.) |
| .LFD | LucasArts Games Resource (Lucasfilm Entertainment Company Ltd.) |
| .LFF | LucasFilm Format |
| .LFG | LensForge Lens Design Specification (Ripplon Software Inc.) |
| .LFL | LucasFilm Library |
| .LFM | Lazarus Lazarus Form Designer File (Free Pascal Lazarus Team) |
| .LFM | LifeForm File |
| .LFP | TrialDirector Load File (inData Corporation) |
| .LFP | LifeForm File |
| .LFP | IPRO View Load File (IPRO Tech Inc.) |
| .LFQ | LeechFTP Queue File |
| .LFT | 3D Studio Loft File (Autodesk, Inc.) |
| .LFT | ChiWriter Laser Printer Font |
| .LFXM | FaceMail Text to Speech E-mail |
| .LG | Arhangel Compressed Archive |
| .LG | Archive Handler by George Lyapko |
| .LG | Logo Procedure Definition |
| .LG2 | HotMux Thermocouple Data Log File (DCC Corporation) |
| .LG? | LoseThos Graphic File (Terry A. Davis) |
| .LGA | Windows Applog File |
| .LGC | Screen Saver Toolkit (Stardust Software) |
| .LGC | Audio |
| .LGC | Program Use Log File |
| .LGC | Windows Application Log |
| .LGC | Corel Layout Designer Logic File for SGML |
| .LGC | Logicator File |
| .LGC | SimpleK Database (Prosystech inc.) |
| .LGD | Windows Application Log |
| .LGE | Windows Application Log |
| .LGF | Legal Eagle Text File |
| .LGF | Logomotion Graphic File (Logotron Ltd.) |
| .LGF | ProWORX Nxt Log Book Note (Schneider Electric) |
| .LGF | Windows Application Log |
| .LGF | LeechGet Download Manager FTP Queue (Martin Albiez) |
| .LGG | Windows Application Log |
| .LGH | Pro/ENGINEER (PTC) |
| .LGH | Windows Application Log |
| .LGI | Multimedia Logic Digital Logic Diagram (Softronics Inc.) |
| .LGI | Windows Application Log |
| .LGJ | Windows Application Log |
| .LGK | Windows Application Log |
| .LGL | Windows Application Log |
| .LGL | LeechGet Download Manager Download Queue (Martin Albiez) |
| .LGM | Windows Application Log |
| .LGN | Windows Application Log |
| .LGO | Windows Logo Driver (Microsoft Corporation) |
| .LGO | SuperFax Header/Footer Logo |
| .LGO | MSWLogo Saved Logo Design (Softronics, Inc.) |
| .LGO | Modern ListGeo Output |
| .LGP | Final Fantasy Game Archive (Square Enix Co., Ltd) |
| .LGP | Logotron SuperLogo File |
| .LGP | Windows Application Log |
| .LGP | Logitech G15 Gaming Keyboard Profile File (Logitech) |
| .LGQ | Windows Application Log |
| .LGR | Windows Application Log |
| .LGR | Elasto Mania Character Skin |
| .LGS | Windows Application Log |
| .LGT | Urban Chaos Game File |
| .LGT | The Sims Lighting File (Electronic Arts (Maxis)) |
| .LGT | Age of Mythology World Lighting Effect (Ensemble Studios Microsoft) |
| .LGX | Logistix Spreadsheet |
| .LGZ | Windows Application Log |
| .LH | Morph File |
| .LHA | Compressed Archive File |
| .LHN | Vosub Encrypted Subtitles (Qsubs) |
| .LHP | Electric Butterfly |
| .LHS | Literate Haskell Source File |
| .LHTS | The Movies Editor Text String Database (The Movies Workshop) |
| .LHW | Compressed Amiga Archive File |
| .LHZ | LHA Compressed Archive File |
| .LI$ | MS Compressed Library |
| .LIA | P-CAD Schematic Library (Altium Limited) |
| .LIB | OrCAD Library Model (Cadence Design Systems, Inc.) |
| .LIB | Game Maker Drag & Drop Actions Library (YoYo Games Limited) |
| .LIB | Finale NotePad Music Library (MakeMusic, Inc.) |
| .LIB | AS/400 Physical File Library (IBM) |
| .LIB | Sibelius House Style File (Sibelius Software Ltd) |
| .LIB | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIB | Greeting Card Library |
| .LIB | Library Used by an Application |
| .LIB | PSpice Library File (Cadence Design Systems, Inc.) |
| .LIB | Program Library Common Object File Format (COFF) (Microsoft Corporation) |
| .lib | Common-Lisp Library |
| .LIB | Scholar's Aid Library File |
| .LIB1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIB2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIB3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIBRARIES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIBRARY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIBS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIC | License File |
| .LIC | Borland License File (Borland Software Corporation) |
| .LIC | PETRA Log Image Calibration File (IHS Inc.) |
| .LIC | ESET NOD32 Antivirus License File (ESET, LLC) |
| .LIC | FLEXnet Manager License File (Acresso Software Inc.) |
| .LICENSE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LICK4 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LID | Maple V Setup File (Maplesoft, a Division of Waterloo Maple Inc.) |
| .LID | WinDVD File |
| .LID | Quicken 2002 Deluxe File (Intuit Inc.) |
| .LID | Light Field Description File |
| .LID | LabelVision Auto Incrementing Value File |
| .LID | Dylan Library Interchange Description |
| .LID | Scholar's Aid Backup File |
| .LID | Lextek Language Identification Module (Lextek International) |
| .LIF | Game of Life Pattern File |
| .LIF | HP Logical Interchange Format File |
| .LIF | Homeworld Layered Image Format File (Sierra) |
| .LIF | Compressed Archive File |
| .LIF | TurboTax Information Archive (Intuit) |
| .LIF | CA Clipper Installer Compressed File Archive |
| .LIF | Knowledge Dynamics Install Archive |
| .LIFE | Game of Life Pattern File |
| .LIFE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIGH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIGHT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIGHTNING | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LILLIES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIM | Limit Compressed Archive |
| .LIN | ArcView ARC/INFO Lineset Symbol File (ESRI) |
| .LIN | AutoCAD Linetype Definition (Autodesk, Inc.) |
| .LIN | VAX Program Listing |
| .LIN | Medlin Accounting Current Period Invoice Detail (Medlin Accounting) |
| .LIN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LINDBERG | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LINEEDIT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LINES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LINK | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LINKTP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LINO | LinoLab Source Code (Linova) |
| .LINUX | File for Linux |
| .LIP | SLIP |
| .LIQ | CollegeBAR Bartending Software Liquor Cabinet |
| .LIQ | Liquid Tracker Song/Module |
| .LIQCRYS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIR | Liram Application Save Application Setting (Liram Ltd.) |
| .LIS | Structured Query Reporting (SQR) Output |
| .LIS | Compiler Listing File |
| .LIS | VAX Program Listing |
| .lisp | LISP Source Code |
| .LISPM | LISP Machine File Bitmap |
| .LIST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LIST | BlindWrite (VSO-Software) |
| .LISTER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LISTING | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LISTLAYOUT | Adium Contact List Layout (The Adium Team) |
| .LISTS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LISTTHEME | Adium Contact List Theme (The Adium Team) |
| .LIT | Movie |
| .LIT | Reader eBook File (Microsoft Corporation) |
| .LIT | Quake Colored Light Data |
| .LIT | AMOS Executable File (Alpha Micro) |
| .LIV | LiveMotion SWF Movie (Adobe Systems Incorporated) |
| .LIV | Living Actor Actor File (Cantoche) |
| .LIV | Yamaha Live Voice File (Yamaha Corporation of America) |
| .LIVEREG | Symantec Anti-Virus Update Session (Symantec Corporation) |
| .LIVESUBSCRIBE | Symantec Anti-Virus Update Catalog (Symantec Corporation) |
| .LIVEUPDATE | Norton Anti-Virus Update Settings File (Symantec Corporation) |
| .LIX | ExtendSim Library File (Imagine That Inc.) |
| .LIX | Libronix DLS Resource |
| .LIZ | Comprressed List File |
| .LI_ | Rukus File |
| .LJ | Text File for HP LJ II Printer |
| .LJ | HP LaserJet Graphic Bitmap |
| .LJB | Lightjockey Backup Database (Martin Professional A/S) |
| .LJBDOWNLOAD | l-JB Download Manager Download Link File |
| .LK | Advanced Revelation and OpenInsight Primary Data Storage Space (Revelation Software) |
| .LKB | Faverly Data Recorder Output |
| .LKD | Pioneer OEL Screensaver (Pioneer Electronics (USA) Inc.) |
| .LKO | Outlook Express Linked Object (Microsoft Corporation) |
| .LKP | Systems Management Server (SMS) Lookup File (Microsoft Corporation) |
| .LKS | WinAmp Links File |
| .LKT | Lookup Table |
| .LKU | T9000 Linkable Unit |
| .LKY | Trojan Troj/Zlob-AGB |
| .LL | List and Label Printer Setup File (combit GmbH) |
| .LL | Links Language Template File |
| .LL3 | LapLink III Document File |
| .LLB | LabVIEW Application Program Library (National Instruments Corporation) |
| .LLC | LapLink Saved Connection File |
| .LLD | Links Language Data File |
| .LLG | LADSIM Ladder Logic Diagram (Bytronic Ltd) |
| .LLP | Lotto Logic 2002 Lottery Configuration File (Timersoft) |
| .LLP | Digital Chart of the World Data File |
| .LLP | VersaPro Local Logic Block |
| .LLSD | Linden Lab Structured Data (Linden Research, Inc.) |
| .LLT | Digital Chart of the World Data File |
| .LLV | Lizard Safeguard License File (LockLizard Ltd) |
| .LLX | List and Label Extension Object (combit GmbH) |
| .LLX | Laplink Exchange Agent |
| .LLX | Tonline Ob4hbci File |
| .LM8 | Picture File |
| .LMA | Learning Mobile Author (LMA) Project File (Hot Lava Software) |
| .LMA | Netscape Packetized Audio |
| .LMD | Tune Smithy List of Modes for a Musical Scale |
| .LMD | ABBYY Finereader 4.0 Sprint (ABBYY Software House) |
| .LME | LegglessMusicEditor Sound/Module |
| .LMH | Memory Hacking Software Memory File (Outdated) (Shawn (L. Spiro) Wilcoxen) |
| .LMI | HomePortal Firmware Recovery File (2Wire, Inc.) |
| .LML | LOGML File |
| .LMP | Doom Recorded Demo File (Id Software, Inc.) |
| .LMP | Quake File |
| .LMR | QuickBooks Loan Manager File (Intuit Inc.) |
| .LMS | Light-O-Rama Lighting Control File (Light-O-Rama) |
| .LMT | RPG Maker 2000/2003 Map Tree (Enterbrain) |
| .LMU | RPG Maker 2000/2003 Map File (Enterbrain, Inc.) |
| .LMV | LiveSwif Movie File |
| .LMV | Flash Source Code (Adobe Systems Incorporated) |
| .LMV | LEGO CAD Movie (The LEGO Group) |
| .LMW | LMW Examples File |
| .LMX | Lomax Software Game File |
| .ln | UNIX lint File |
| .LN03 | DEC LN03+ Sixel Bitmap |
| .LNB | Logomanager File |
| .LND | 3D Landscape Data |
| .LNED | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LNF | Oyoaha lookandfeel Interface Elements (Oyoaha) |
| .LNG | Jasmine Language File |
| .LNG | Lingo Script File |
| .LNG | Lahey FORTRAN Language Extension |
| .LNG | NRG SDR Language File |
| .LNG | Diablo II (Blizzard Entertainment) |
| .LNG | Language File |
| .LNG | DeepBurner Language File (ASTONSOFT Co.) |
| .LNG | Acrobat Language Plug-in (Adobe Systems Incorporated) |
| .LNG | Launch-n-Go Shared Keyboard Shortcuts (Tethys Solutions, LLC.) |
| .LNG | SourceEdit Language Definition |
| .LNGTH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LNK | XNBC V8 Biological Neural Network Simulation Workstation Link Configuration File |
| .LNK | Linker File |
| .LNK | Advanced Revelation Database File (Revelation Software) |
| .LNK | Windows Shortcut File (Microsoft Corporation) |
| .LNK | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LNK2 | Program Neighborhood Explorer Shortcut (Citrix Systems, Inc.) |
| .LNM | WordPerfect SGML Alias (Corel Corporation) |
| .LNR | Lunar Invasion Saved Game |
| .LNS | LinkStash Bookmark File |
| .LNS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LNT | LiveNote Case File (LiveNote Technologies) |
| .LNT | ARMACON Data File (LNT Engenharia [LNTinfopage]) |
| .LNX | Atari Lynx ROM Image (Atari) |
| .LNX | Lynx Project File (Zippety Software) |
| .LO | GNU Libtool Library Object File (GNU Project - Free Software Foundation) |
| .LO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LO4 | SeeYou Flight Data (Naviter) |
| .LOAD | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOADER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOADS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOAN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOANS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOANX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOC | EasyGPS TerraByte Location File (TopoGrafix) |
| .LOC | Localisation String Resource Header File |
| .LOC | MicroSim PCBoard Component Locations Report |
| .LOC | Suppose Locations File |
| .LOCAL | Xset Setup Program Bin File |
| .LOCAL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOCATOR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOCK | .NET Framework Database Lock File (Microsoft Corporation) |
| .LOCKED | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOCKED | Softwrap Locked and Encrypted EXE File (Softwrap) |
| .LOCKSMITHING | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOD | Homeworld Level Of Detail (Sierra Entertainment, Inc.) |
| .LOD | Load File |
| .LOD | A-10 Cuba! Weapons Loadout (Activision, Inc.) |
| .LOF | LaTeX Auxiliary File for List Of Figures |
| .LOG | PDP-10 Batch Log File |
| .LOG | MS HTMLHelp Log |
| .LOG | ProWORX Nxt Text Log File (Schneider Electric) |
| .LOG | TrialDirector Load File (inData Corporation) |
| .LOG | HijackThis Log File (Trend Micro Incorporated) |
| .LOG | Pro/ENGINEER (PTC) |
| .LOG | Log File |
| .LOG | SeeYou Flight Data (Naviter) |
| .LOG | Wise Installer Log (Symantec Corporation) |
| .LOG | LabVIEW Binary Datalog (National Instruments Corporation) |
| .LOGIN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGO2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGO3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGO4 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGOFF | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGON | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOGONVISTA | LogonStudio Vista Logon Image (Stardock Corporation, Inc.) |
| .LOGONXP | LogonStudio Document (Stardock Corporation, Inc.) |
| .LOK | OmniPage Ver 9 File (Nuance Communications, Inc.) |
| .LOK | FileWrangler/ZipWrangler/SecurDesk! Encrypted Archive |
| .LOL | Lolcode Source File (Lolcode) |
| .LOLLY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LONG | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOO | Sterlingware Fractal Parameter File (Stephen Ferguson) |
| .LOOK | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOOP | Soundtrack Hinted Audio Loop (Apple Inc.) |
| .LOOP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOOP1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOOP2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOOPA6 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOP | Sierra Mastercook Layout File |
| .LOSANGELE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOT | LaTeX Auxiliary File for List Of Figures |
| .LOUD | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOUD3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOVE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LOW | PDP-10 Low Segment of a Two-Segment Program |
| .LOWSTRINGS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LO_ | Systems Management Server (SMS) Renamed Old Log File (Microsoft Corporation) |
| .LP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LP | LaTeX Drawing File (LaTeX3 Project) |
| .LP | LP88 Linear Programming for the IBM-PC File |
| .LP | NASCAR Racing 2002 Track Configuration Options (Sierra) |
| .LP | FlexRip/B |
| .LP | Lightscape Preparation File |
| .LP1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LP3 | Hansen Software Label Printer |
| .LP4 | Hansen Software Label Printer |
| .LP4 | 36-Image Converter Encrypted Language Pack (UIC Phoenxsoftware) |
| .LP7 | LP7Signer Digital Signed File (Lex Persona) |
| .LPA | LPA-View Laser Particle Analyser Test Analysis Software |
| .LPB | LP88 Linear Programming for the IBM-PC File |
| .LPB | ProWORX Nxt Logic Pointer (Schneider Electric) |
| .LPC | Teko Printer Driver |
| .LPC | Linear Predictive Coding Sound |
| .LPC | LivePC Engine Subscription Information (moka5) |
| .LPD | LogonProcessor Configuration Database (VAI) |
| .LPD | LECTURNITY Multimedia Audio/Video/Clips Presentation Document (IMC AG) |
| .LPD | Label Pro Ver. 2.0-3.02 Data File (Avery) |
| .LPD | Helix Nuts and Bolts File |
| .LPF | LogicPort LA1034 Logic Analyzer Project (Intronix Test Instruments, Inc.) |
| .LPF | Lytec's Direct Electronic Medical Claims ClaimsDirect |
| .LPF | ProWORX Nxt Logic Pointer (Schneider Electric) |
| .LPG | Lowrey Organ Registration (Setup) File (Lowrey Organ Company) |
| .LPI | Live Pictures |
| .LPI | Free Pascal Lazarus Project Information File |
| .LPJ | PASSOLO Localization Project |
| .LPJ | SoftwareShield License Manager License Project File (SoftwareShield Technologies Inc.) |
| .LPK | Lazarus Lazarus Package File (Free Pascal Lazarus Team) |
| .LPK | License Package |
| .LPL | Darkstone Character Information File |
| .LPN | LVPlan - Planification of Low Voltage Aerial Distribution Networks |
| .LPP | Let's Photo Photo Slideshow (Canopus Co., Ltd.) |
| .LPR | Homeworld (Sierra Entertainment, Inc.) |
| .LPR | LAPRO Source Code File (Marco Mugnatto) |
| .LPR | Lazarus Free Pascal Lazarus Project File |
| .LPROJ | Mac OS X Localized Project Folder |
| .LPT | LogPlot/LogView Compiled Boring Log (RockWare, Inc.) |
| .LPT | TrialDirector Load File (inData Corporation) |
| .LPT | PDP-10 Line Printer Output |
| .LPU | PASSOLO Localization Project |
| .LQ | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LQF | Leech FTP Save Queue File |
| .LQP | Liquid Audio Player Passport File (Geneva Media, LLC) |
| .LQR | Compressed Archive File |
| .LQT | Winamp File |
| .LQT | Liquid Audio Player File (Geneva Media, LLC) |
| .LR | Chaos Desktop Layer List (Chaos systems AB) |
| .LRC | Lyric File |
| .LRC | StepMania Lyric File (StepMania) |
| .LRC | Dance With Intensity |
| .LRC | Intel Video Phone Language Resource Control (Intel Corporation) |
| .LRD | Money Locked Database File (Microsoft Corporation) |
| .LRF | C/C++ Linker Response File (Microsoft Corporation) |
| .LRF | Line Rider 2 Unbound Custom-Drawn In-Game Font (inXile entertainment) |
| .LRF | BroadBand eBook |
| .LRG | Macromedia XRes Multi-resolution Bitmap |
| .LRM | Line Rider 2 Unbound Saved Track (inXile entertainment) |
| .LRM | Encarta Class Server Learning Resource (Microsoft Corporation) |
| .LRP | Line Rider 2 Unbound Puzzle Part (inXile entertainment) |
| .LRP | Linux Router Project Package |
| .LRP | IBM Works for OS/2 Report |
| .LRR | Mercury LoadRunner Test Results File (Mercury Interactive Corporation) |
| .LRS | Language Resource File (Corel) |
| .LRS | Lode Runner 2 Savegame (GT Interactive(now Atari/Infogrames)) |
| .LRS | Daylon Leveller Rendition Style |
| .LRS | Mercury LoadRunner Scenario (Mercury Interactive Corporation) |
| .LRS | Lazarus Lazarus Resource File (Free Pascal Lazarus Team) |
| .LRS | Lexar Encrypted File (Lexar Media, Inc.) |
| .LRT | Yacc: Yet Another Compiler-Compiler Log File |
| .LRU | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LRX | BroadBand Secure eBook |
| .LRZ | Lotto Hat File |
| .LS | Unix ls Directory File |
| .LS | Links 98 Game File |
| .LS | Freeware Dictionary Project Data File |
| .LS | Lightscape Solution File |
| .LS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LS1 | Winhelp Source file |
| .LS1 | OzWin CompuServe E-mail/Forum Access Library Listing |
| .LS1 | Cokriging Software VARIO Output File |
| .LS2 | Cokriging Software COREG Output File |
| .LSA | LightScape Technologies ASCII Data |
| .LSA | Liquid Audio Player Skin File (Geneva Media, LLC) |
| .LSB | LightScape Technologies Binary Data |
| .LSC | Tune Smithy List of Muscial Scales |
| .LSC | LOGO!Soft Comfort Circuit File (Siemens AG) |
| .LSD | RPG Maker 2000/2003 Saved Game File (Enterbrain) |
| .LSD | Fifa World Cup Game Data Environment File |
| .LSD | ABBYY Lingvo Non-changaeble System Dictionary (ABBYY Software House) |
| .LSD | LECTURNITY Presentation File Source Format (IMC AG) |
| .LSE | Audio Manager (Nokia) |
| .LSF | Streaming Audio/Video File |
| .LSF | Libronix DLS Resource |
| .LSF | Totem Cash Profile File |
| .LSG | LocStudio Glossary (Microsoft Corporation) |
| .LSI | Audio |
| .LSI | Corel Layout Specification Instance SGML |
| .LSL | Liquid Audio Player Resource DLL (Geneva Media, LLC) |
| .LSL | Corel Paradox Saved Library |
| .LSL | Daylon Leveller Shape List |
| .LSL | Lotus Script Library (IBM) |
| .LSLANG | Ad-Aware Language File (Lavasoft) |
| .LSLIDE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .lsm | Linux Software Map |
| .LSN | Works File (Microsoft Corporation) |
| .LSO | BHV Tonstudio Platin File |
| .LSO | Logic Audio File |
| .LSP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LSP | Liquid Player Playlist (Liquid Studio) |
| .lsp | Common-Lisp Source Code |
| .LSP | Living Scenes Jigsaw Puzzles |
| .LSP | AutoLISP Application Source Code (Autodesk, Inc.) |
| .LSQ | MRS-802 Phrase Loop Formula Data (Zoom Corporation) |
| .LSQ | CalTech PaleoMag Least Squares Format |
| .LSQ | IBM Voice Type Language Addword File |
| .LSQ | VAX CRYSTALS Chemical Crystallogaphy File |
| .LSR | Logos Library System 2.x Standard Reference Definition |
| .LSS | LotusScript Program File |
| .LSS | Legato Spreadsheet |
| .LSSAVE | Memory Hacking Software Memory File (Shawn (L. Spiro) Wilcoxen) |
| .LST | IMail Server List Server Mail (Ipswitch, Inc.) |
| .LST | Listing or List |
| .LST | Valve Map Related File (Valve Corporation) |
| .LST | 1st Reader Keyboard Macro |
| .LST | Oracle Spool File |
| .LST | Family Tree Maker Error File |
| .LST | Ingres Dump List File (Computer Associates International, Inc.) |
| .LST | PowerPoint View File (Microsoft Corporation) |
| .LST | OzWin CompuServe E-mail/Forum Access Library Listing |
| .LST | Kaspersky Lab Blacklist File (Kaspersky Lab) |
| .LST | MovieList Deluxe Project/Playlist file (ASW Software) |
| .LST | SignIQ Field List (ImpulseLogic) |
| .LST | BPM Studio Play List (ALCATech) |
| .LST | Orchida Knitting System (Orchida Soft) |
| .LST | Pro/ENGINEER Temporary File (PTC) |
| .LST | SAS Procedure Output (SAS Institute Inc.) |
| .LST | Acrobat Font List File (Adobe Systems Incorporated) |
| .LSW | Technics Keyboard Current Panel File |
| .LSW | Golf Swapfiles File |
| .LSX | Streaming Audio/Video Shortcut |
| .LSZ | WinFax (Symantec Corporation) |
| .LSZ | Adressmn File |
| .LSZ | LiteStep Installer Theme File (beyondconvention) |
| .LS_ | Unix ls Directory File |
| .LT | Shape Cut (Laxmi Technologies) |
| .LT | PC LTAS Printer Configuration File |
| .LT2 | Curious Labs Poser Lighting File |
| .LTB | Amma Lsb v1.0 |
| .LTD | LivingTime Data File (Lifescope Inc.) |
| .LTE | Adressmn |
| .LTF | Frogans Short-cut (STG Interactive SA) |
| .LTG | Lasertank Bitmap Graphics |
| .LTH | Easy CD Creator Theme File (Sonic Solutions) |
| .LTH | Sierra Print Artist Letterhead |
| .LTL | Linear Temporal Logic Formula |
| .LTM | EOSAT Landsat Thematic Mapper Bitmap Data |
| .LTM | Lotus Form (IBM) |
| .LTM | LiteMail Database/Project (Sprika Software) |
| .LTPL | Insight II Layout Template File (Accelrys Software Inc.) |
| .LTR | ACT! Letter (Best Software CRM Division) |
| .LTR | Letter |
| .LTT | HP Library and Tape Tools Log File |
| .LTT | SDR99 Speech Recognition Task Lexical TREC Transcription |
| .LTT | MicroImages Text Layout (MicroImages, Inc.) |
| .LTX | LaTeX Mathematical Text Document |
| .LU | ThoughtWing Library Unit File |
| .LUA | Homeworld Generic Lua File (Sierra Entertainment, Inc.) |
| .LUA | Lua Source (Tecgraf - Computer Graphics Technology Group) |
| .LUA | Lua Player for PSP Script (InsertWittyName) |
| .LUB | Star Wars Game File (Lucasfilm Ltd.) |
| .LUCS | Amaya Tools |
| .LUDI_PSEUDO_PROTEIN | Insight II Exclusion Shell File (Accelrys Software Inc.) |
| .LUF | Lipikar Text (Santanu Ghosh,) |
| .LUL | OzWin CompuServe E-mail/Forum Access Upload |
| .LUMPSUM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LUN | DB-MAIN Project File (REVER S.A.) |
| .LUNCH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LUP | OzWin CompuServe E-mail/Forum Access Library Update |
| .LUT | LUT File |
| .LUT | Osiris Prefs Colordir File |
| .LUTE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LUX | Spectramap Database (Coloritto BV) |
| .LUXB | Lux Saved Map File (Sillysoft) |
| .LV1 | Boulder Rash Original Single Level |
| .LV5 | Return to Wonderland Deluxe Version Level File (Midnight Synergy) |
| .LV6 | Return to Wonderland Platinum Version Level File (Midnight Synergy) |
| .LVA | Logitech Video Effects Avatar and Face Accessory (Logitech) |
| .LVB | Outlaws Binary Mission Files (LucasArts Entertainment Company LLC) |
| .LVD | LPA-View Data File (MP Filtri U.K. Ltd.) |
| .LVF | Logitech Video Effects Avatar and Face Accessory (Logitech) |
| .LVL | Max Payne Uncompiled Level File (Rockstar Games) |
| .LVL | Zero Editor Zero Engine Game File (Lucasfilm Ltd.) |
| .LVL | Lasertank Level |
| .LVL | Lode Runner 2 Level/User Level (GT Interactive(now Atari/Infogrames)) |
| .LVL | Parallax Miner Descent/D2 Level Extension Level Extension |
| .LVL | Continuum Zone Data (SubSpaceDownloads.com) |
| .LVL | Boulder Rash Original Full Levels |
| .LVL | Snood Game Level |
| .LVM | LabVIEW Measurement (National Instruments Corporation) |
| .LVP | Avaya Voice Player Compressed Voice Audio (Avaya Inc.) |
| .LVP | LView Pro Image |
| .LVP | Lucent Voice Player |
| .LVS | Daylon Leveller Selection Mask |
| .LVT | Outlaws Text Mission Files (LucasArts Entertainment Company LLC) |
| .LVU | Livid Union Project File (Livid Instruments) |
| .LVW | Daylon Leveller View File |
| .LVZ | Continuum Zone Data Graphics (SubSpaceDownloads.com) |
| .LW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LW | LightWave (ClearJump) |
| .LW | Line Work TIFF Bitmap |
| .LW2 | Lightwright Version 2 Show Data File (John McKernon Software) |
| .LW3 | Lightwright Version 3 Show Data File (John McKernon Software) |
| .LW4 | Lightwright Version 4 Show Data File (John McKernon Software) |
| .LW5 | Lightwright Version 5 Show Data File (John McKernon Software) |
| .LWA | Lightwright Automated Action File (John McKernon Software) |
| .LWA | LightWorks Archive (LWA) Material/Scene File (LightWork Design Ltd.) |
| .LWC | Living Word Commentaries Bible File |
| .LWD | LotusWorks Text Document (IBM) |
| .LWF | LuraWave-compressed Graphic File |
| .LWI | LightWorks Image (LightWork Design Ltd.) |
| .LWK | LonghornMax Data File (Cattlesoft, Inc.) |
| .LWL | Lightwright Printed Paperwork Formatting Instructions (John McKernon Software) |
| .LWM | LittleWays Map (hfrmobile) |
| .LWO | LightWave 3D 3D Object (NewTek) |
| .LWO | Tstream Editor Studio Translation Package (Xplanation Language Services) |
| .LWP | Wordpro 96/97 Document (IBM) |
| .LWP | IBM Works for OS/2 Document |
| .LWP | Lightwright Dimmer Rack Power Phase Layouts (John McKernon Software) |
| .LWR | RollerCoaster Tycoon Laser Writing (Atari) |
| .LWS | LightWave 3D 3D Scene File (NewTek) |
| .LWT | Lightwright Attribute List File (John McKernon Software) |
| .LWTP | LimeWire Theme File (Lime Wire LLC.) |
| .LWV | Linguistically Enhanced Sound File (Microsoft Corporation) |
| .LWV | Litewave Audio File (MASTLabs LLC) |
| .LWY | Lightwright Library File (John McKernon Software) |
| .LX | LPEX Customization Command Profile |
| .LXA | Office Speech Lexicon File (Microsoft Corporation) |
| .LXD | Lexacom Data File (Aprobrium Limited) |
| .LXD | eDictionary Reader Dictionary Data File (PPCLINK) |
| .LXF | Lenex Compressed XML Data (GeoLogix AG) |
| .LXF | LEGO CAD Scene File (The LEGO Group) |
| .LXFML | LEGO CAD Digital Designer XML Data (The LEGO Group) |
| .LXG | LEGO CAD PC/Macintosh Exchange Format (The LEGO Group) |
| .LXL | LPEX File Open Command Profile |
| .LXM | Lexacom Mobile PDA Dictation File (Aprobrium Limited) |
| .LXML | Leerling Volg Systeem Leering File (Zoutewelle Media Groep b.v.) |
| .LXN | SeeYou Flight Data (Naviter) |
| .LXO | LaserMaster Font |
| .LXS | LPEX File Save Command Profile |
| .LXV | Lexar Secure II Encrypted Vault (Lexar Media, Inc.) |
| .LXW | Lexacom Talk & Type Dictation File |
| .LY | GNU LilyPond |
| .LY+ | DataCAD Plus Layer (DATACAD LLC) |
| .LYNX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LYR | DataCAD Layer File (DATACAD LLC) |
| .LYR | Song Lyric File |
| .LYR | Lyrics for Audio CD |
| .LYRIX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LYS | DataCAD Layer Control File (DATACAD LLC) |
| .LYT | MicroImages Text Layout (MicroImages, Inc.) |
| .LYT | MetaCAM Layout (Metamation, Inc.) |
| .LYT | DESQview (Symantec Corporation) |
| .LYT | Printed Circuit Board Layout File |
| .LYT | SignMaking Application Extension |
| .LYT | TurboTax Install Log File (Intuit) |
| .LYX | LyX |
| .LZ | lzip Compressed File (Antonio Diaz Diaz) |
| .LZA | LZA Animation/Video |
| .LZD | Binary Difference File |
| .LZF | 3ds Max Lens Effect Flare (Autodesk, Inc.) |
| .LZH | Compressed Archive File |
| .LZM | Slax Add-on Module |
| .LZMA | 7-Zip Compressed File (Igor Pavlov) |
| .LZO | lzop Compressed Archive |
| .LZR | Compressed Archive File |
| .LZS | Compressed Archive File |
| .LZS | LARC Compressed File Archive |
| .LZS | Skyroads Data File |
| .LZSS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .LZW | Compressed Amiga Archive File |
| .LZW | LHWarp Compressed Amiga File Archive |
| .LZX | OpenLaszlo Web Application (Laszlo Systems, Inc.) |
| .LZX | Compressed File |
| .LZZZZZZZ | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |