| lx | LPEX Customization Command Profile |
| lx01 | EnCase Logical Evidence Data |
| lx3 | Lounge Lizard EP3 Exchange Data |
| lxa | Microsoft Speech Lexicon |
| lxd | eDictionary Reader Dictionary Data |
| lxd | Lexacom Data |
| lxf | Compressed LEN Exchange Format File |
| lxk | COREX Lexicon Link-up Data |
| lxl | LPEX Load Macro |
| lxl | Luxology Modo Single-layer Mesh Data |
| lxp | MODO Luxology Asset File |
| lxplot | LXFree Plot File |
| lxq | DAZ Studio Frame List Data |
| lxs | LPEX Save Macro |
| lxt | Icarus Verilog interLaced eXtensible Trace |
| lxt2 | Icarus Verilog interLaced eXtensible Trace |
| lxu | LPEX User Profile |
| lxx | LXFree XML Plot |
| ly2 | EAGLE Inner Signal Layer GERBER Data |
| ly3 | EAGLE Inner Signal Layer GERBER Data |
| lyf | LayoutFAST Layout Data |
| lyr | DataCAD Layer Data |
| lys | DataCAD Layer Control Data |
| lyt | DESQview Layout Data |
| lyt | Intuit TurboTax Install Log File |
| lyt | MetaCAM Layout Data |
| lyt | Thermo Xcalibur Layout Data |
| lzf | Autodesk 3D Studio MAX Lens Effect Flare Data |
| lzk | LoizziTimeControl Database |
| lzt | HPE Library and Tape Tools Compressed Support Ticket |
