| Abbreviation | Definition |
|---|---|
| LRF | Linker response file (MS C/C++) |
| LRP | Report (IBM Works for OS/2) |
| LRS | WordPerfect for Windows Language Resource File |
| LRT | Log file (Yacc) |
| LSA | LightScape Technologies ASCII data |
| LSB | LightScape Technologies Binary data |
| LSP | Lisp language source code file |
| LSS | LeCroy Setup Script |
| LSS | Legato - IBM Works for OS/2 SpreadSheet |
| LSS | Spreadsheet (Legato - IBM Works for OS/2) |
| LST | Keyboard macro (1st Reader) |
| LST | List file archive index |
| LST | Oracle Spool file |
| LST | Source code LiSTing file |
| LTFS | Long Term File System |
| LTM | EOSAT's Landsat Thematic Mapper data file (Bitmap graphics) |
| LTM | Form (Lotus Forms) |
| LTX | LaTeX Mathematical TeXt document |
| LWD | LotusWorks text Document |
| LWF | Luratech Wavelet Format |