| l3dw | VTales Store Visualizer External Library |
| l4d | Maxon Cinema 4D Layout Data |
| l5e | VecTor5 Extended Load Output Data |
| l5k | RSLogix 5000 Project Export Data |
| l5r | VecTor5 Load Case Data |
| l5x | RSLogix 5000 XML Data |
| l64 | 64LAN Image |
| l6t | Line 6 POD HD500X Tone Data |
| la | Microth InPad Layout File |
| Netscape Navigator LiveAudio Data |
| la1 | Liquid Audio Player LA1 Data |
| lab | BibExcel LAB Data |
| Corel WordPerfect Label Definition Data |
| MRMC Label Data |
| Steinberg WaveLab CD/DVD Label Set |
| label | FreeSurfer Label |
| ImageMagick Label Data |
| labels | Amira 3D Mesh Label Data |
| labx | CASSY Lab Data |
| Maestro Labor Analysis File |
| NetSim Custom Lab Data |
| lac | Cognos Local Authentication Cache |
| lad | Daylon Leveller Animation |
| lae | IBM Cognos Local Authentication Export |
| laf | Essential Taceo License Activation File |
| Lingoes Appendix Data |
| lak | Kashmir 3D Lake Data |
| lanalyser | Novell Netware LANalyzer Trace Data |
| land | Userland Frontier Data |
| landsat | Landsat Thematic Mapper Data |
| lang | Skype Language File |
| langz | DigiChat Language Data |
| lao | EPSON Smart Panel Data |
| lar | Liquid Audio Player Registration Data |
| las | Lidar Data Exchange Format File |
| Log ASCII Standard |
| lasso | PLINK LASSO Data |
| last | Steam Last Data |
| lat | Crossword Express Lattice Data |
| LaTeX Data |
| lau | AutoClient Local Authentication Data |
| lav | BLASTZ DNA Sequence Alignment Data |
| Liquid Audio Player Voucher Data |
| lavs | Liquid Audio Player Secured Download Data |
| lax | AnetHelpTool JavaHelp Viewer File |
| lay | Apple DVD Studio Pro Layout Data |
| ArchiCAD PlotMaker Layout |
| eSignal Layout Data |
| Lightscape Layer File |
| MAME Layout Data |
| MasterCook Layout Data |
| Pro/ENGINEER Layout |
| Rhino 3D Layer |
| Tecplot 360 Layout Data |
| Track Builder 3 Layout Data |
| layout | Adobe Premiere Workspace Layout |
| Apple MainStage Layout Data |
| BookWright Layout Data |
| Concordance Table Layout Data |
| Steam Client GUI Layout Data |
| layoutdesigner | Intuit QuickBooks Layout Designer Data |
| layup | MSC Patran Layup Data |
| layx | PTV VISSIM Vehicle Network Data |
| laz | LASzip Compressed Lidar Data |
| la_ | TI Databook Data |
| lbd | Life Balance Data File |
| Nicolet OMNIC Library |
| lbe | Life Balance XML Exchange Data |
| lbg | dBASE IV Label Generator Data |
| lbk | ArchiCAD PlotMaker Layout Book |
| lbl | Daqarta Label Data |
| Now Contact Label Template |
| lbo | dBASE IV Compiled Label |
| lbr | CP/M Library |
| EAGLE Library File |
| lbt | Nicolet OMNIC LBT Library |
| lbv | T-Online Ob4hbci Layout Print File |
| lbw | CCP Log Server Log |
| lbxadd | Libronix DLS Addin Data |
| lbxalv | Logos Bible Software Series X Passage in All Versions Data |
