| Abbreviation | Definition |
|---|---|
| LJ | Bitmap graphics (HP LaserJet graphics file) |
| LKU | T9000 linkable unit |
| LL3 | Laplink III related file |
| LLSCF | Lex Language Source Code File |
| LMA | LiveAudio packetized audio |
| LMP | Demo for Doom (3- D computer game) |
| LN03 | DEC LN03+ Sixel file Bitmap graphics |
| LNG | Language definition file |
| LNG | Language extensions (Lahey Fortran) |
| LNK | Link (shortcut) (Windows 95) |
| LNK | Linker script (.RTLink) |
| LOC | Localization string resource header file |
| LOD | Load file |
| LOF | Auxiliary file for List Of Figures (LaTeX) |
| LOG | Log file |
| LOT | Auxiliary file for List Of Tables (LaTeX) |
| LPC | Printer driver (TEKO) |
| LPC | Sound (Linear Predictive Coding) |
| LPD | Helix Nuts and Bolts file |
| LRC | Intel Video Phone file |