| lao | EPSON Smart Panel Data |
| lar | Liquid Audio Player Registration Data |
| las | Lidar Data Exchange Format File |
| las | Log ASCII Standard |
| lasso | PLINK LASSO Data |
| lat | Crossword Express Lattice Data |
| lau | AutoClient Local Authentication Data |
| lav | Liquid Audio Player Voucher Data |
| lavs | Liquid Audio Player Secured Download Data |
| lax | AnetHelpTool JavaHelp Viewer File |
| lay | ArchiCAD PlotMaker Layout |
| lay | eSignal Layout Data |
| lay | Lightscape Layer File |
| lay | MasterCook Layout Data |
| lay | Pro/ENGINEER Layout |
| lay | Rhino 3D Layer |
| lay | Tecplot 360 Layout Data |
| layout | Adobe Premiere Workspace Layout |
| layout | BookWright Layout Data |
| layout | Concordance Table Layout Data |
| layoutdesigner | Intuit QuickBooks QuickBooks Layout Designer Data |
| layx | PTV VISSIM Vehicle Network Data |
| laz | LASzip Compressed Lidar Data |
| la_ | TI Databook Data |
| lbd | Life Balance Data File |
| lbd | Nicolet OMNIC Library |
| lbe | Life Balance XML Exchange Data |
| lbg | dBASE IV Label Generator Data |
| lbk | ArchiCAD PlotMaker Layout Book |
| lbo | dBASE IV Compiled Label |
