| Abbreviation | Definition |
|---|---|
| LFD | LucasArts resource file (LucasArts games) |
| LFT | Laser printer FonT |
| LG | Arhangel Compressed file archive |
| LG | Logo procedure definitions (LSRHS Logo) |
| LGO | Logo for header and footer ( SuperFax) |
| LGO | Windows 3.x Startup logo code |
| LHA | Compressed file archive (LHA - LHARC) |
| LHS | Literate Haskell source code file |
| LHW | Compressed Amiga file archive (LHWarp) |
| LHZ | Compressed file archive (LHA) |
| LIB | Library file (several programming languages) |
| LIBGFL221.DLL | Dynamic Link Library |
| LIC | License file |
| LIF | CA Clipper Installer compressed File archive |
| LIF | Hewlett-Packard Logical Interchange Format data file |
| LIM | Compressed file archive (Limit) |
| LIN | Line types (AutoCAD) |
| LIN | Vector data (ARC format) |
| LIS | Listing (VAX) |
| LISPM | Bitmap graphics (Lisp Machine file) |